1
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Viviani M, Girlanda L, Kievsky A, Logoteta D, Marcucci LE. Theoretical Study of the d(d, p)^{3}H and d(d, n)^{3}He Processes at Low Energies. Phys Rev Lett 2023; 130:122501. [PMID: 37027864 DOI: 10.1103/physrevlett.130.122501] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/06/2022] [Revised: 09/28/2022] [Accepted: 02/16/2023] [Indexed: 06/19/2023]
Abstract
We present a theoretical study of the processes d(d,p)^{3}H and d(d,n)^{3}He at energies of interest for energy production and for big-bang nucleosynthesis. We accurately solve the four body scattering problem using the ab initio hyperspherical harmonics method, starting from nuclear Hamiltonians which include modern two- and three-nucleon interactions, derived in chiral effective field theory. We report results for the astrophysical S factor, the quintet suppression factor, and various single and double polarized observables. A first estimate of the theoretical uncertainty for all these quantities is provided by varying the cutoff parameter used to regularize the chiral interactions at high momentum.
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Affiliation(s)
- M Viviani
- Istituto Nazionale di Fisica Nucleare, Sezione di Pisa, Largo Bruno Pontecorvo 3, I-56127 Pisa, Italy
| | - L Girlanda
- Department of Mathematics and Physics, University of Salento, Via Arnesano, I-73100 Lecce, Italy
- INFN-Lecce, Via Arnesano, I-73100 Lecce, Italy
| | - A Kievsky
- Istituto Nazionale di Fisica Nucleare, Sezione di Pisa, Largo Bruno Pontecorvo 3, I-56127 Pisa, Italy
| | - D Logoteta
- Department of Physics "E. Fermi", University of Pisa, Largo Bruno Pontecorvo 3, I-56127 Pisa, Italy
| | - L E Marcucci
- Istituto Nazionale di Fisica Nucleare, Sezione di Pisa, Largo Bruno Pontecorvo 3, I-56127 Pisa, Italy
- Department of Physics "E. Fermi", University of Pisa, Largo Bruno Pontecorvo 3, I-56127 Pisa, Italy
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2
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Apponi A, Betti M, Borghesi M, Boyarsky A, Canci N, Cavoto G, Chang C, Cheianov V, Cheipesh Y, Chung W, Cocco A, Colijn A, D’Ambrosio N, de Groot N, Esposito A, Faverzani M, Ferella A, Ferri E, Ficcadenti L, Frederico T, Gariazzo S, Gatti F, Gentile C, Giachero A, Hochberg Y, Kahn Y, Lisanti M, Mangano G, Marcucci L, Mariani C, Marques M, Menichetti G, Messina M, Mikulenko O, Monticone E, Nucciotti A, Orlandi D, Pandolfi F, Parlati S, Pepe C, Pérez de los Heros C, Pisanti O, Polini M, Polosa A, Puiu A, Rago I, Raitses Y, Rajteri M, Rossi N, Rozwadowska K, Rucandio I, Ruocco A, Strid C, Tan A, Teles L, Tozzini V, Tully C, Viviani M, Zeitler U, Zhao F. Heisenberg’s uncertainty principle in the PTOLEMY project: A theory update. Int J Clin Exp Med 2022. [DOI: 10.1103/physrevd.106.053002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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3
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Mossa V, Stöckel K, Cavanna F, Ferraro F, Aliotta M, Barile F, Bemmerer D, Best A, Boeltzig A, Broggini C, Bruno CG, Caciolli A, Chillery T, Ciani GF, Corvisiero P, Csedreki L, Davinson T, Depalo R, Di Leva A, Elekes Z, Fiore EM, Formicola A, Fülöp Z, Gervino G, Guglielmetti A, Gustavino C, Gyürky G, Imbriani G, Junker M, Kievsky A, Kochanek I, Lugaro M, Marcucci LE, Mangano G, Marigo P, Masha E, Menegazzo R, Pantaleo FR, Paticchio V, Perrino R, Piatti D, Pisanti O, Prati P, Schiavulli L, Straniero O, Szücs T, Takács MP, Trezzi D, Viviani M, Zavatarelli S. The baryon density of the Universe from an improved rate of deuterium burning. Nature 2020; 587:210-213. [PMID: 33177669 DOI: 10.1038/s41586-020-2878-4] [Citation(s) in RCA: 58] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2020] [Accepted: 09/16/2020] [Indexed: 11/09/2022]
Abstract
Light elements were produced in the first few minutes of the Universe through a sequence of nuclear reactions known as Big Bang nucleosynthesis (BBN)1,2. Among the light elements produced during BBN1,2, deuterium is an excellent indicator of cosmological parameters because its abundance is highly sensitive to the primordial baryon density and also depends on the number of neutrino species permeating the early Universe. Although astronomical observations of primordial deuterium abundance have reached percent accuracy3, theoretical predictions4-6 based on BBN are hampered by large uncertainties on the cross-section of the deuterium burning D(p,γ)3He reaction. Here we show that our improved cross-sections of this reaction lead to BBN estimates of the baryon density at the 1.6 percent level, in excellent agreement with a recent analysis of the cosmic microwave background7. Improved cross-section data were obtained by exploiting the negligible cosmic-ray background deep underground at the Laboratory for Underground Nuclear Astrophysics (LUNA) of the Laboratori Nazionali del Gran Sasso (Italy)8,9. We bombarded a high-purity deuterium gas target10 with an intense proton beam from the LUNA 400-kilovolt accelerator11 and detected the γ-rays from the nuclear reaction under study with a high-purity germanium detector. Our experimental results settle the most uncertain nuclear physics input to BBN calculations and substantially improve the reliability of using primordial abundances to probe the physics of the early Universe.
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Affiliation(s)
- V Mossa
- INFN, Sezione di Bari, Bari, Italy
| | - K Stöckel
- Helmholtz-Zentrum Dresden-Rossendorf, Dresden, Germany.,Technische Universität Dresden, Dresden, Germany
| | - F Cavanna
- INFN, Sezione di Genova, Genoa, Italy.,INFN, Sezione di Torino, Turin, Italy
| | - F Ferraro
- INFN, Sezione di Genova, Genoa, Italy.,Università degli Studi di Genova, Genoa, Italy
| | - M Aliotta
- School of Physics and Astronomy, SUPA, University of Edinburgh, Edinburgh, UK
| | - F Barile
- INFN, Sezione di Bari, Bari, Italy
| | - D Bemmerer
- Helmholtz-Zentrum Dresden-Rossendorf, Dresden, Germany
| | - A Best
- Università degli Studi di Napoli "Federico II", Naples, Italy.,INFN, Sezione di Napoli, Naples, Italy
| | - A Boeltzig
- Gran Sasso Science Institute, L'Aquila, Italy.,INFN, Laboratori Nazionali del Gran Sasso (LNGS), Assergi, Italy
| | | | - C G Bruno
- School of Physics and Astronomy, SUPA, University of Edinburgh, Edinburgh, UK
| | - A Caciolli
- INFN, Sezione di Padova, Padua, Italy.,Università degli Studi di Padova, Padua, Italy
| | - T Chillery
- School of Physics and Astronomy, SUPA, University of Edinburgh, Edinburgh, UK
| | - G F Ciani
- Gran Sasso Science Institute, L'Aquila, Italy.,INFN, Laboratori Nazionali del Gran Sasso (LNGS), Assergi, Italy
| | - P Corvisiero
- INFN, Sezione di Genova, Genoa, Italy.,Università degli Studi di Genova, Genoa, Italy
| | - L Csedreki
- Gran Sasso Science Institute, L'Aquila, Italy.,INFN, Laboratori Nazionali del Gran Sasso (LNGS), Assergi, Italy
| | - T Davinson
- School of Physics and Astronomy, SUPA, University of Edinburgh, Edinburgh, UK
| | - R Depalo
- INFN, Sezione di Padova, Padua, Italy
| | - A Di Leva
- Università degli Studi di Napoli "Federico II", Naples, Italy.,INFN, Sezione di Napoli, Naples, Italy
| | - Z Elekes
- Institute for Nuclear Research (Atomki), Debrecen, Hungary
| | - E M Fiore
- INFN, Sezione di Bari, Bari, Italy.,Dipartimento Interateneo di Fisica, Università degli Studi di Bari, Bari, Italy
| | - A Formicola
- INFN, Laboratori Nazionali del Gran Sasso (LNGS), Assergi, Italy
| | - Zs Fülöp
- Institute for Nuclear Research (Atomki), Debrecen, Hungary
| | - G Gervino
- Università degli Studi di Torino, Turin, Italy.,INFN, Sezione di Torino, Turin, Italy
| | - A Guglielmetti
- Università degli Studi di Milano, Milan, Italy.,INFN, Sezione di Milano, Milan, Italy
| | | | - G Gyürky
- Institute for Nuclear Research (Atomki), Debrecen, Hungary
| | - G Imbriani
- Università degli Studi di Napoli "Federico II", Naples, Italy.,INFN, Sezione di Napoli, Naples, Italy
| | - M Junker
- INFN, Laboratori Nazionali del Gran Sasso (LNGS), Assergi, Italy
| | | | - I Kochanek
- INFN, Laboratori Nazionali del Gran Sasso (LNGS), Assergi, Italy
| | - M Lugaro
- Konkoly Observatory, Research Centre for Astronomy and Earth Sciences, MTA Centre for Excellence, Budapest, Hungary.,Institute of Physics, ELTE Eötvös Loránd University, Budapest, Hungary
| | - L E Marcucci
- INFN, Sezione di Pisa, Pisa, Italy.,Dipartimento di Fisica "E. Fermi", Università degli Studi di Pisa, Pisa, Italy
| | - G Mangano
- Università degli Studi di Napoli "Federico II", Naples, Italy.,INFN, Sezione di Napoli, Naples, Italy
| | - P Marigo
- INFN, Sezione di Padova, Padua, Italy.,Università degli Studi di Padova, Padua, Italy
| | - E Masha
- Università degli Studi di Milano, Milan, Italy.,INFN, Sezione di Milano, Milan, Italy
| | | | - F R Pantaleo
- INFN, Sezione di Bari, Bari, Italy.,Dipartimento Interateneo di Fisica, Politecnico di Bari, Bari, Italy
| | | | - R Perrino
- INFN, Sezione di Bari, Bari, Italy.,INFN, Sezione di Lecce, Lecce, Italy
| | - D Piatti
- INFN, Sezione di Padova, Padua, Italy
| | - O Pisanti
- Università degli Studi di Napoli "Federico II", Naples, Italy.,INFN, Sezione di Napoli, Naples, Italy
| | - P Prati
- INFN, Sezione di Genova, Genoa, Italy.,Università degli Studi di Genova, Genoa, Italy
| | - L Schiavulli
- INFN, Sezione di Bari, Bari, Italy.,Dipartimento Interateneo di Fisica, Università degli Studi di Bari, Bari, Italy
| | - O Straniero
- INFN, Laboratori Nazionali del Gran Sasso (LNGS), Assergi, Italy.,INAF Osservatorio Astronomico d'Abruzzo, Teramo, Italy
| | - T Szücs
- Helmholtz-Zentrum Dresden-Rossendorf, Dresden, Germany
| | - M P Takács
- Helmholtz-Zentrum Dresden-Rossendorf, Dresden, Germany.,Technische Universität Dresden, Dresden, Germany
| | - D Trezzi
- Università degli Studi di Milano, Milan, Italy.,INFN, Sezione di Milano, Milan, Italy
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Higgins MD, Greene CH, Kievsky A, Viviani M. Nonresonant Density of States Enhancement at Low Energies for Three or Four Neutrons. Phys Rev Lett 2020; 125:052501. [PMID: 32794850 DOI: 10.1103/physrevlett.125.052501] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/08/2020] [Revised: 06/26/2020] [Accepted: 07/06/2020] [Indexed: 06/11/2023]
Abstract
The low energy systems of three or four neutrons are treated within the adiabatic hyperspherical framework, yielding an understanding of the low energy quantum states in terms of an adiabatic potential energy curve. The dominant low energy potential curve for each system, computed here using widely accepted nucleon-nucleon interactions with and without the inclusion of a three-nucleon force, shows no sign of a low energy resonance. However, both systems exhibit a low energy enhancement of the density of states, or of the Wigner-Smith time delay, which derives from long-range universal physics analogous to the Efimov effect. That enhancement could be relevant to understanding the low energy excess of correlated four-neutron ejection events observed experimentally in a nuclear reaction by Kisamori et al. [Phys. Rev. Lett. 116, 052501 (2016)PRLTAO0031-900710.1103/PhysRevLett.116.052501].
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Affiliation(s)
- Michael D Higgins
- Department of Physics and Astronomy, Purdue University, West Lafayette, Indiana 47907, USA
| | - Chris H Greene
- Department of Physics and Astronomy, Purdue University, West Lafayette, Indiana 47907, USA and Purdue Quantum Science and Engineering Institute, Purdue University, West Lafayette, Indiana 47907, USA
| | - A Kievsky
- Instituto Nazionale di Fisica Nucleare, Largo Pontecorvo 3, 56127 Pisa, Italy
| | - M Viviani
- Instituto Nazionale di Fisica Nucleare, Largo Pontecorvo 3, 56127 Pisa, Italy
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5
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Marcucci LE, Schiavilla R, Viviani M. Erratum: Proton-Proton Weak Capture in Chiral Effective Field Theory [Phys. Rev. Lett. 110, 192503 (2013)]. Phys Rev Lett 2019; 123:019901. [PMID: 31386412 DOI: 10.1103/physrevlett.123.019901] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/28/2019] [Indexed: 06/10/2023]
Abstract
This corrects the article DOI: 10.1103/PhysRevLett.110.192503.
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6
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Presto S, Artini C, Pani M, Carnasciali MM, Massardo S, Viviani M. Ionic conductivity and local structural features in Ce 1-xSm xO 2-x/2. Phys Chem Chem Phys 2018; 20:28338-28345. [PMID: 30398485 DOI: 10.1039/c8cp04186e] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Sm-Doped ceria is one of the most promising materials to be used as electrolyte in solid oxide fuel cells due to its remarkable ionic conductivity values in the intermediate temperature range. Transport properties and local structural features of Ce1-xSmxO2-x/2 (0.1 ≤ x ≤ 0.7) were studied by an impedance/μ-Raman spectroscopy coupled approach up to 1073 K. Results suggest that C-based nanosized defect clusters are responsible for the drop in ionic conductivity observed even at x = 0.2, i.e. at a Sm content lower than necessary to allow C domains to reach the percolation threshold through crystallites. Moreover, within the fluorite-type compositional region, with increasing the Sm content, defect clusters undergo a rearrangement resulting in the enlargement of C-based domains rather than in the increase of their number; at higher x, on the contrary, both the size and amount of C domains increase in parallel.
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Affiliation(s)
- S Presto
- Istituto di Chimica della Materia Condensata e di Tecnologie per l'Energia (ICMATE), Consiglio Nazionale delle Ricerche (CNR), c/o DICCA-UNIGE, Via all'Opera Pia 15, 16145 Genova, Italy.
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7
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Kievsky A, Viviani M, Logoteta D, Bombaci I, Girlanda L. Correlations imposed by the unitary limit between few-nucleon systems, nuclear matter, and neutron stars. Phys Rev Lett 2018; 121:072701. [PMID: 30169068 DOI: 10.1103/physrevlett.121.072701] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/14/2018] [Revised: 07/04/2018] [Indexed: 06/08/2023]
Abstract
The large values of the singlet and triplet two-nucleon scattering lengths locate the nuclear system close to the unitary limit. This particular position strongly constrains the low-energy observables in the three-nucleon system as depending on one parameter, the triton binding energy, and introduces correlations in the low-energy sector of light nuclei. Here we analyze the propagation of these correlations to infinite nuclear matter showing that its saturation properties, the equation of state of β-stable nuclear matter, and several properties of neutron stars, as their maximum mass, are well determined solely by a few number of low-energy quantities of the two- and three-nucleon systems. In this way we make a direct link between the universal behavior observed in the low-energy region of few-nucleon systems and fundamental properties of nuclear matter and neutron stars.
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Affiliation(s)
- A Kievsky
- Istituto Nazionale di Fisica Nucleare, Largo Pontecorvo 3, 56127 Pisa, Italy
| | - M Viviani
- Istituto Nazionale di Fisica Nucleare, Largo Pontecorvo 3, 56127 Pisa, Italy
| | - D Logoteta
- Istituto Nazionale di Fisica Nucleare, Largo Pontecorvo 3, 56127 Pisa, Italy
| | - I Bombaci
- Istituto Nazionale di Fisica Nucleare, Largo Pontecorvo 3, 56127 Pisa, Italy
- Department of Physics, University of Pisa, 56127 Pisa, Italy
| | - L Girlanda
- Department of Mathematics and Physics, University of Salento, I-73100 Lecce, Italy
- Istituto Nazionale di Fisica Nucleare, Sezione di Lecce, I-73100 Lecce, Italy
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8
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Marcucci LE, Kievsky A, Rosati S, Schiavilla R, Viviani M. Erratum: Chiral Effective Field Theory Predictions for Muon Capture on Deuteron and ^{3}He [Phys. Rev. Lett. 108, 052502 (2012)]. Phys Rev Lett 2018; 121:049901. [PMID: 30095967 DOI: 10.1103/physrevlett.121.049901] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/29/2018] [Indexed: 06/08/2023]
Abstract
This corrects the article DOI: 10.1103/PhysRevLett.108.052502.
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9
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Piarulli M, Baroni A, Girlanda L, Kievsky A, Lovato A, Lusk E, Marcucci LE, Pieper SC, Schiavilla R, Viviani M, Wiringa RB. Light-Nuclei Spectra from Chiral Dynamics. Phys Rev Lett 2018; 120:052503. [PMID: 29481181 DOI: 10.1103/physrevlett.120.052503] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2017] [Indexed: 06/08/2023]
Abstract
In recent years local chiral interactions have been derived and implemented in quantum Monte Carlo methods in order to test to what extent the chiral effective field theory framework impacts our knowledge of few- and many-body systems. In this Letter, we present Green's function Monte Carlo calculations of light nuclei based on the family of local two-body interactions presented by our group in a previous paper in conjunction with chiral three-body interactions fitted to bound- and scattering-state observables in the three-nucleon sector. These interactions include Δ intermediate states in their two-pion-exchange components. We obtain predictions for the energy levels and level ordering of nuclei in the mass range A=4-12, accurate to ≤2% of the binding energy, in very satisfactory agreement with experimental data.
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Affiliation(s)
- M Piarulli
- Physics Division, Argonne National Laboratory, Argonne, Illinois 60439, USA
| | - A Baroni
- Department of Physics, Old Dominion University, Norfolk, Virginia 23529, USA
| | - L Girlanda
- Department of Mathematics and Physics, University of Salento, 73100 Lecce, Italy
- INFN-Lecce, 73100 Lecce, Italy
| | | | - A Lovato
- Physics Division, Argonne National Laboratory, Argonne, Illinois 60439, USA
- INFN-Trento, 38050 Povo, Italy
| | - Ewing Lusk
- Mathematics and Computer Science Division, Argonne National Laboratory, Argonne, Illinois 60439, USA
| | - L E Marcucci
- INFN-Pisa, 56127 Pisa, Italy
- Department of Physics, University of Pisa, 56127 Pisa, Italy
| | - Steven C Pieper
- Physics Division, Argonne National Laboratory, Argonne, Illinois 60439, USA
| | - R Schiavilla
- Department of Physics, Old Dominion University, Norfolk, Virginia 23529, USA
- Theory Center, Jefferson Lab, Newport News, Virginia 23606, USA
| | | | - R B Wiringa
- Physics Division, Argonne National Laboratory, Argonne, Illinois 60439, USA
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10
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Camsonne A, Katramatou AT, Olson M, Acha A, Allada K, Anderson BD, Arrington J, Baldwin A, Chen JP, Choi S, Chudakov E, Cisbani E, Craver B, Decowski P, Dutta C, Folts E, Frullani S, Garibaldi F, Gilman R, Gomez J, Hahn B, Hansen JO, Higinbotham DW, Holmstrom T, Huang J, Iodice M, Jiang X, Kelleher A, Khrosinkova E, Kievsky A, Kuchina E, Kumbartzki G, Lee B, LeRose JJ, Lindgren RA, Lott G, Lu H, Marcucci LE, Margaziotis DJ, Markowitz P, Marrone S, Meekins D, Meziani ZE, Michaels R, Moffit B, Norum B, Petratos GG, Puckett A, Qian X, Rondon O, Saha A, Sawatzky B, Segal J, Shabestari M, Shahinyan A, Solvignon P, Sparveris N, Subedi RR, Suleiman R, Sulkosky V, Urciuoli GM, Viviani M, Wang Y, Wojtsekhowski BB, Yan X, Yao H, Zhang WM, Zheng X, Zhu L. Publisher's Note: JLab Measurements of the ^{3}He Form Factors at Large Momentum Transfers [Phys. Rev. Lett. 119, 162501 (2017)]. Phys Rev Lett 2017; 119:209901. [PMID: 29219338 DOI: 10.1103/physrevlett.119.209901] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/02/2017] [Indexed: 06/07/2023]
Abstract
This corrects the article DOI: 10.1103/PhysRevLett.119.162501.
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11
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Camsonne A, Katramatou AT, Olson M, Acha A, Allada K, Anderson BD, Arrington J, Baldwin A, Chen JP, Choi S, Chudakov E, Cisbani E, Craver B, Decowski P, Dutta C, Folts E, Frullani S, Garibaldi F, Gilman R, Gomez J, Hahn B, Hansen JO, Higinbotham DW, Holmstrom T, Huang J, Iodice M, Jiang X, Kelleher A, Khrosinkova E, Kievsky A, Kuchina E, Kumbartzki G, Lee B, LeRose JJ, Lindgren RA, Lott G, Lu H, Marcucci LE, Margaziotis DJ, Markowitz P, Marrone S, Meekins D, Meziani ZE, Michaels R, Moffit B, Norum B, Petratos GG, Puckett A, Qian X, Rondon O, Saha A, Sawatzky B, Segal J, Shabestari M, Shahinyan A, Solvignon P, Sparveris N, Subedi RR, Suleiman R, Sulkosky V, Urciuoli GM, Viviani M, Wang Y, Wojtsekhowski BB, Yan X, Yao H, Zhang WM, Zheng X, Zhu L. JLab Measurements of the ^{3}He Form Factors at Large Momentum Transfers. Phys Rev Lett 2017; 119:162501. [PMID: 29099223 DOI: 10.1103/physrevlett.119.162501] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/31/2016] [Indexed: 06/07/2023]
Abstract
The charge and magnetic form factors, F_{C} and F_{M}, respectively, of ^{3}He are extracted in the kinematic range 25 fm^{-2}≤Q^{2}≤61 fm^{-2} from elastic electron scattering by detecting ^{3}He recoil nuclei and scattered electrons in coincidence with the two High Resolution Spectrometers of the Hall A Facility at Jefferson Lab. The measurements find evidence for the existence of a second diffraction minimum for the magnetic form factor at Q^{2}=49.3 fm^{-2} and for the charge form factor at Q^{2}=62.0 fm^{-2}. Both minima are predicted to exist in the Q^{2} range accessible by this Jefferson Lab experiment. The data are in qualitative agreement with theoretical calculations based on realistic interactions and accurate methods to solve the three-body nuclear problem.
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Affiliation(s)
- A Camsonne
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | | | - M Olson
- St. Norbert College, De Pere, Wisconsin 54115, USA
| | - A Acha
- Florida International University, Miami, Florida 33199, USA
| | - K Allada
- University of Kentucky, Lexington, Kentucky 40506, USA
| | | | - J Arrington
- Argonne National Laboratory, Argonne, Illinois 60439, USA
| | - A Baldwin
- Kent State University, Kent, Ohio 44242, USA
| | - J-P Chen
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - S Choi
- Seoul National University, Seoul 151-747, Korea
| | - E Chudakov
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - E Cisbani
- Istituto Nazionale di Fisica Nucleare, Sezione di Roma, 00185 Rome, Italy
- Istituto Superiore di Sanità, 00161 Rome, Italy
| | - B Craver
- University of Virginia, Charlottesville, Virginia 22904, USA
| | - P Decowski
- Smith College, Northampton, Massachusetts 01063, USA
| | - C Dutta
- University of Kentucky, Lexington, Kentucky 40506, USA
| | - E Folts
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - S Frullani
- Istituto Nazionale di Fisica Nucleare, Sezione di Roma, 00185 Rome, Italy
- Istituto Superiore di Sanità, 00161 Rome, Italy
| | - F Garibaldi
- Istituto Nazionale di Fisica Nucleare, Sezione di Roma, 00185 Rome, Italy
- Istituto Superiore di Sanità, 00161 Rome, Italy
| | - R Gilman
- Rutgers, The State University of New Jersey, Piscataway, New Jersey 08855, USA
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - J Gomez
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - B Hahn
- College of William and Mary, Williamsburg, Virginia 23185, USA
| | - J-O Hansen
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - D W Higinbotham
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - T Holmstrom
- Longwood University, Farmville, Virginia 23909, USA
| | - J Huang
- Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - M Iodice
- Istituto Nazionale di Fisica Nucleare, Sezione di Roma Tre, 00146 Rome, Italy
| | - X Jiang
- Rutgers, The State University of New Jersey, Piscataway, New Jersey 08855, USA
| | - A Kelleher
- College of William and Mary, Williamsburg, Virginia 23185, USA
| | | | - A Kievsky
- Istituto Nazionale di Fisica Nucleare, Sezione di Pisa, 56127 Pisa, Italy
| | - E Kuchina
- Rutgers, The State University of New Jersey, Piscataway, New Jersey 08855, USA
| | - G Kumbartzki
- Rutgers, The State University of New Jersey, Piscataway, New Jersey 08855, USA
| | - B Lee
- Seoul National University, Seoul 151-747, Korea
| | - J J LeRose
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - R A Lindgren
- University of Virginia, Charlottesville, Virginia 22904, USA
| | - G Lott
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - H Lu
- University of Science and Technology of China, Hefei, Anhui 230026, People's Republic of China
| | - L E Marcucci
- Istituto Nazionale di Fisica Nucleare, Sezione di Pisa, 56127 Pisa, Italy
- University of Pisa, 56127 Pisa, Italy
| | - D J Margaziotis
- California State University, Los Angeles, California 90032, USA
| | - P Markowitz
- Florida International University, Miami, Florida 33199, USA
| | - S Marrone
- Istituto Nazionale di Fisica Nucleare, Sezione di Bari and University of Bari, 70126 Bari, Italy
| | - D Meekins
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - Z-E Meziani
- Temple University, Philadelphia, Pennsylvania 19122, USA
| | - R Michaels
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - B Moffit
- Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - B Norum
- University of Virginia, Charlottesville, Virginia 22904, USA
| | | | - A Puckett
- Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - X Qian
- Duke University (TUNL), Durham, North Carolina 27708, USA
| | - O Rondon
- University of Virginia, Charlottesville, Virginia 22904, USA
| | - A Saha
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - B Sawatzky
- Temple University, Philadelphia, Pennsylvania 19122, USA
| | - J Segal
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - M Shabestari
- University of Virginia, Charlottesville, Virginia 22904, USA
| | - A Shahinyan
- Yerevan Physics Institute, Yerevan 375036, Armenia
| | - P Solvignon
- Argonne National Laboratory, Argonne, Illinois 60439, USA
| | - N Sparveris
- Kent State University, Kent, Ohio 44242, USA
- Temple University, Philadelphia, Pennsylvania 19122, USA
| | - R R Subedi
- University of Virginia, Charlottesville, Virginia 22904, USA
| | - R Suleiman
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - V Sulkosky
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - G M Urciuoli
- Istituto Nazionale di Fisica Nucleare, Sezione di Roma, 00185 Rome, Italy
| | - M Viviani
- Istituto Nazionale di Fisica Nucleare, Sezione di Pisa, 56127 Pisa, Italy
| | - Y Wang
- University of Illinois at Urbana Champagne, Urbana, Illinois 61801, USA
| | - B B Wojtsekhowski
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - X Yan
- Seoul National University, Seoul 151-747, Korea
| | - H Yao
- Temple University, Philadelphia, Pennsylvania 19122, USA
| | - W-M Zhang
- Kent State University, Kent, Ohio 44242, USA
| | - X Zheng
- University of Virginia, Charlottesville, Virginia 22904, USA
| | - L Zhu
- University of Illinois at Urbana Champagne, Urbana, Illinois 61801, USA
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12
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Williams KE, Berthelsen D, Viviani M, Nicholson JM. Participation of Australian Aboriginal and Torres Strait Islander families in a parent support programme: longitudinal associations between playgroup attendance and child, parent and community outcomes. Child Care Health Dev 2017; 43:441-450. [PMID: 27739085 DOI: 10.1111/cch.12417] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/20/2016] [Revised: 08/29/2016] [Accepted: 09/12/2016] [Indexed: 11/30/2022]
Abstract
BACKGROUND Playgroups are a relatively unique form of family support programme that is common in Australia which has high community acceptance and significant government investment. However, limited evidence exists regarding the effectiveness of playgroups to achieve better outcomes for children and their parents. This study describes patterns of playgroup participation for Aboriginal and Torres Strait Islander families with young children and examines the extent to which participation from birth to three years is associated with subsequent child, parent and community outcomes. METHODS This study uses three years of longitudinal data for 622 Aboriginal and Torres Strait Islander children who were participants in the Longitudinal Study of Indigenous Children (LSIC). Longitudinal associations between playgroup attendance when children were age 2 and 3 years and outcome measures for child vocabulary, motor skills, behaviour problems, prosocial development, parent home learning engagement, resilience, advice-seeking and health service use, and community trustworthiness were examined using path analysis. RESULTS Rates of playgroup participation in this sample group were generally lower than for Australian children overall. Playgroup attendance when children were age 2 to 3 years was associated with higher parental engagement in home learning activities when children were aged 4 years which, in turn, was associated with stronger expressive vocabulary scores for children. CONCLUSION The findings from this study suggest that playgroup participation can enhance the home learning environments for Aboriginal and Torres Strait Islander children. Playgroups as a parent support programme hold strong potential to reach and engage families, particularly in areas of high geographic isolation, which can realize improved outcomes for children, parents and communities.
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Affiliation(s)
- K E Williams
- School of Early Childhood, Queensland University of Technology, Brisbane, QLD, Australia
| | - D Berthelsen
- School of Early Childhood, Queensland University of Technology, Brisbane, QLD, Australia
| | - M Viviani
- School of Early Childhood, Queensland University of Technology, Brisbane, QLD, Australia
| | - J M Nicholson
- Judith Lumley Centre, La Trobe University, Melbourne, VIC, Australia
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13
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de Paula W, Frederico T, Salmè G, Viviani M. Advances in solving the two-fermion homogeneous Bethe-Salpeter equation in Minkowski space. Int J Clin Exp Med 2016. [DOI: 10.1103/physrevd.94.071901] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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14
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Marcucci LE, Mangano G, Kievsky A, Viviani M. Erratum: Implication of the Proton-Deuteron Radiative Capture for Big Bang Nucleosynthesis [Phys. Rev. Lett. 116, 102501 (2016)]. Phys Rev Lett 2016; 117:049901. [PMID: 27494504 DOI: 10.1103/physrevlett.117.049901] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/06/2016] [Indexed: 06/06/2023]
Abstract
This corrects the article DOI: 10.1103/PhysRevLett.116.102501.
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15
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Marcucci LE, Mangano G, Kievsky A, Viviani M. Implication of the Proton-Deuteron Radiative Capture for Big Bang Nucleosynthesis. Phys Rev Lett 2016; 116:102501. [PMID: 27015474 DOI: 10.1103/physrevlett.116.102501] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/27/2015] [Indexed: 06/05/2023]
Abstract
The astrophysical S factor for the radiative capture d(p,γ)^{3}He in the energy range of interest for big bang nucleosynthesis (BBN) is calculated using an ab initio approach. The nuclear Hamiltonian retains both two- and three-nucleon interactions-the Argonne v_{18} and the Urbana IX, respectively. Both one- and many-body contributions to the nuclear current operator are included. The former retain for the first time, besides the 1/m leading order contribution (m is the nucleon mass), also the next-to-leading order term, proportional to 1/m^{3}. The many-body currents are constructed in order to satisfy the current conservation relation with the adopted Hamiltonian model. The hyperspherical harmonics technique is applied to solve the A=3 bound and scattering states. Particular attention is paid in this second case in order to obtain, in the energy range of BBN, an uncertainty on the astrophysical S factor of the order or below ∼1%. Then, in this energy range, the S factor is found to be ∼10% larger than the currently adopted values. Part of this increase (1%-3%) is due to the 1/m^{3} one-body operator, while the remaining is due to the new more accurate scattering wave functions. We have studied the implication of this new determination for the d(p,γ)^{3}He S factor on the deuterium primordial abundance. We find that the predicted theoretical value for ^{2}H/H is in excellent agreement with its experimental determination, using the most recent determination of the baryon density of the Planck experiment, and with a standard number of relativistic degrees of freedom N_{eff}=3.046 during primordial nucleosynthesis. This calls for a more accurate measurement of the astrophysical S factor in order to confirm the present predictions.
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Affiliation(s)
- L E Marcucci
- Department of Physics, University of Pisa, Largo B. Pontecorvo 3, I-56127 Pisa, Italy
- INFN-Pisa, Largo B. Pontecorvo 3, I-56127 Pisa, I-56127 Pisa, Italy
| | - G Mangano
- INFN-Napoli, Complesso Univ. Monte S. Angelo, Via Cintia, I-80126 Napoli, Italy
| | - A Kievsky
- INFN-Pisa, Largo B. Pontecorvo 3, I-56127 Pisa, I-56127 Pisa, Italy
| | - M Viviani
- INFN-Pisa, Largo B. Pontecorvo 3, I-56127 Pisa, I-56127 Pisa, Italy
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16
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Mihovilovič M, Jin G, Long E, Zhang YW, Allada K, Anderson B, Annand JRM, Averett T, Boeglin W, Bradshaw P, Camsonne A, Canan M, Cates GD, Chen C, Chen JP, Chudakov E, De Leo R, Deng X, Deltuva A, Deur A, Dutta C, El Fassi L, Flay D, Frullani S, Garibaldi F, Gao H, Gilad S, Gilman R, Glamazdin O, Golak J, Golge S, Gomez J, Hansen O, Higinbotham DW, Holmstrom T, Huang J, Ibrahim H, de Jager CW, Jensen E, Jiang X, Jones M, Kang H, Katich J, Khanal HP, Kievsky A, King P, Korsch W, LeRose J, Lindgren R, Lu HJ, Luo W, Marcucci LE, Markowitz P, Meziane M, Michaels R, Moffit B, Monaghan P, Muangma N, Nanda S, Norum BE, Pan K, Parno D, Piasetzky E, Posik M, Punjabi V, Puckett AJR, Qian X, Qiang Y, Qui X, Riordan S, Saha A, Sauer PU, Sawatzky B, Schiavilla R, Schoenrock B, Shabestari M, Shahinyan A, Širca S, Skibiński R, John JS, Subedi R, Sulkosky V, Tobias WA, Tireman W, Urciuoli GM, Viviani M, Wang D, Wang K, Wang Y, Watson J, Wojtsekhowski B, Witała H, Ye Z, Zhan X, Zhang Y, Zheng X, Zhao B, Zhu L. Measurement of double-polarization asymmetries in the quasielastic (3)He[→](e[→],e(')d) process. Phys Rev Lett 2014; 113:232505. [PMID: 25526124 DOI: 10.1103/physrevlett.113.232505] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/11/2014] [Indexed: 06/04/2023]
Abstract
We present a precise measurement of double-polarization asymmetries in the ^{3}He[over →](e[over →],e^{'}d) reaction. This particular process is a uniquely sensitive probe of hadron dynamics in ^{3}He and the structure of the underlying electromagnetic currents. The measurements have been performed in and around quasielastic kinematics at Q^{2}=0.25(GeV/c)^{2} for missing momenta up to 270 MeV/c. The asymmetries are in fair agreement with the state-of-the-art calculations in terms of their functional dependencies on p_{m} and ω, but are systematically offset. Beyond the region of the quasielastic peak, the discrepancies become even more pronounced. Thus, our measurements have been able to reveal deficiencies in the most sophisticated calculations of the three-body nuclear system, and indicate that further refinement in the treatment of their two-and/or three-body dynamics is required.
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Affiliation(s)
| | - G Jin
- University of Virginia, Charlottesville, Virginia 22908, USA
| | - E Long
- Kent State University, Kent, Ohio 44242, USA
| | - Y-W Zhang
- Rutgers University, New Brunswick, New Jersey 08901, USA
| | - K Allada
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - B Anderson
- Kent State University, Kent, Ohio 44242, USA
| | - J R M Annand
- Glasgow University, Glasgow G12 8QQ, Scotland, United Kingdom
| | - T Averett
- The College of William and Mary, Williamsburg, Virginia 23187, USA
| | - W Boeglin
- Florida International University, Miami, Florida 33181, USA
| | - P Bradshaw
- The College of William and Mary, Williamsburg, Virginia 23187, USA
| | - A Camsonne
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - M Canan
- Old Dominion University, Norfolk, Virginia 23529, USA
| | - G D Cates
- University of Virginia, Charlottesville, Virginia 22908, USA
| | - C Chen
- Hampton University, Hampton, Virginia 23669, USA
| | - J P Chen
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - E Chudakov
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - R De Leo
- Università degli studi di Bari Aldo Moro, I-70121 Bari, Italy
| | - X Deng
- University of Virginia, Charlottesville, Virginia 22908, USA
| | - A Deltuva
- Center for Nuclear Physics, University of Lisbon, P-1649-003 Lisbon, Portugal and Institute for Theoretical Physics and Astronomy, Vilnius University, LT-01108 Vilnius, Lithuania
| | - A Deur
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - C Dutta
- University of Kentucky, Lexington, Kentucky 40506, USA
| | - L El Fassi
- Rutgers University, New Brunswick, New Jersey 08901, USA
| | - D Flay
- Temple University, Philadelphia, Pennsylvania 19122, USA
| | - S Frullani
- Istituto Nazionale Di Fisica Nucleare, INFN/Sanita, Roma, Italy
| | - F Garibaldi
- Istituto Nazionale Di Fisica Nucleare, INFN/Sanita, Roma, Italy
| | - H Gao
- Duke University, Durham, North Carolina 27708, USA
| | - S Gilad
- Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - R Gilman
- Rutgers University, New Brunswick, New Jersey 08901, USA
| | - O Glamazdin
- Kharkov Institute of Physics and Technology, Kharkov 61108, Ukraine
| | - J Golak
- M. Smoluchowski Institute of Physics, Jagiellonian University, PL-30059 Kraków, Poland
| | - S Golge
- Old Dominion University, Norfolk, Virginia 23529, USA
| | - J Gomez
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - O Hansen
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - D W Higinbotham
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - T Holmstrom
- Longwood College, Farmville, Virginia 23909, USA
| | - J Huang
- Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - H Ibrahim
- Cairo University, Cairo, Giza 12613, Egypt
| | - C W de Jager
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - E Jensen
- Christopher Newport University, Newport News, Virginia 23606, USA
| | - X Jiang
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
| | - M Jones
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - H Kang
- Seoul National University, Seoul, Korea
| | - J Katich
- The College of William and Mary, Williamsburg, Virginia 23187, USA
| | - H P Khanal
- Florida International University, Miami, Florida 33181, USA
| | | | - P King
- Ohio University, Athens, Ohio 45701, USA
| | - W Korsch
- University of Kentucky, Lexington, Kentucky 40506, USA
| | - J LeRose
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - R Lindgren
- University of Virginia, Charlottesville, Virginia 22908, USA
| | - H-J Lu
- Huangshan University, People's Republic of China
| | - W Luo
- Lanzhou University, Lanzhou, Gansu, 730000, People's Republic of China
| | - L E Marcucci
- Physics Department, Pisa University, I-56127 Pisa, Italy
| | - P Markowitz
- Florida International University, Miami, Florida 33181, USA
| | - M Meziane
- The College of William and Mary, Williamsburg, Virginia 23187, USA
| | - R Michaels
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - B Moffit
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - P Monaghan
- Hampton University, Hampton, Virginia 23669, USA
| | - N Muangma
- Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - S Nanda
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - B E Norum
- University of Virginia, Charlottesville, Virginia 22908, USA
| | - K Pan
- Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - D Parno
- Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA
| | | | - M Posik
- Temple University, Philadelphia, Pennsylvania 19122, USA
| | - V Punjabi
- Norfolk State University, Norfolk, Virginia 23504, USA
| | - A J R Puckett
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
| | - X Qian
- Duke University, Durham, North Carolina 27708, USA
| | - Y Qiang
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - X Qui
- Lanzhou University, Lanzhou, Gansu, 730000, People's Republic of China
| | - S Riordan
- University of Virginia, Charlottesville, Virginia 22908, USA
| | - A Saha
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - P U Sauer
- Institute for Theoretical Physics, University of Hannover, D-30167 Hannover, Germany
| | - B Sawatzky
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - R Schiavilla
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA and Old Dominion University, Norfolk, Virginia 23529, USA
| | - B Schoenrock
- Northern Michigan University, Marquette, Michigan 49855, USA
| | - M Shabestari
- University of Virginia, Charlottesville, Virginia 22908, USA
| | | | - S Širca
- Jožef Stefan Institute, SI-1000 Ljubljana, Slovenia and University of Ljubljana, SI-1000 Ljubljana, Slovenia
| | - R Skibiński
- M. Smoluchowski Institute of Physics, Jagiellonian University, PL-30059 Kraków, Poland
| | - J St John
- Longwood College, Farmville, Virginia 23909, USA
| | - R Subedi
- George Washington University, Washington, D.C. 20052, USA
| | - V Sulkosky
- Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - W A Tobias
- University of Virginia, Charlottesville, Virginia 22908, USA
| | - W Tireman
- Northern Michigan University, Marquette, Michigan 49855, USA
| | - G M Urciuoli
- Istituto Nazionale Di Fisica Nucleare, INFN/Sanita, Roma, Italy
| | | | - D Wang
- University of Virginia, Charlottesville, Virginia 22908, USA
| | - K Wang
- University of Virginia, Charlottesville, Virginia 22908, USA
| | - Y Wang
- University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA
| | - J Watson
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - B Wojtsekhowski
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - H Witała
- M. Smoluchowski Institute of Physics, Jagiellonian University, PL-30059 Kraków, Poland
| | - Z Ye
- Hampton University, Hampton, Virginia 23669, USA
| | - X Zhan
- Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - Y Zhang
- Lanzhou University, Lanzhou, Gansu, 730000, People's Republic of China
| | - X Zheng
- University of Virginia, Charlottesville, Virginia 22908, USA
| | - B Zhao
- The College of William and Mary, Williamsburg, Virginia 23187, USA
| | - L Zhu
- Hampton University, Hampton, Virginia 23669, USA
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17
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Silvestri L, de la Cal MA, Cerda E, Viviani M, van Saene HKF. Use of enteral vancomycin for meticillin resistant Staphylococcus aureus (MRSA) in intensive care. BMJ 2014; 348:g2594. [PMID: 24709856 DOI: 10.1136/bmj.g2594] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Affiliation(s)
- L Silvestri
- Department of Emergency, Unit of Anaesthesia and Intensive Care, Presidio Ospedaliero, Gorizia, Italy
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18
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Camsonne A, Katramatou AT, Olson M, Sparveris N, Acha A, Allada K, Anderson BD, Arrington J, Baldwin A, Chen JP, Choi S, Chudakov E, Cisbani E, Craver B, Decowski P, Dutta C, Folts E, Frullani S, Garibaldi F, Gilman R, Gomez J, Hahn B, Hansen JO, Higinbotham DW, Holmstrom T, Huang J, Iodice M, Jiang X, Kelleher A, Khrosinkova E, Kievsky A, Kuchina E, Kumbartzki G, Lee B, LeRose JJ, Lindgren RA, Lott G, Lu H, Marcucci LE, Margaziotis DJ, Markowitz P, Marrone S, Meekins D, Meziani ZE, Michaels R, Moffit B, Norum B, Petratos GG, Puckett A, Qian X, Rondon O, Saha A, Sawatzky B, Segal J, Shabestari M, Shahinyan A, Solvignon P, Subedi RR, Suleiman R, Sulkosky V, Urciuoli GM, Viviani M, Wang Y, Wojtsekhowski BB, Yan X, Yao H, Zhang WM, Zheng X, Zhu L. JLab measurement of the 4He charge form factor at large momentum transfers. Phys Rev Lett 2014; 112:132503. [PMID: 24745410 DOI: 10.1103/physrevlett.112.132503] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/24/2013] [Indexed: 06/03/2023]
Abstract
The charge form factor of 4He has been extracted in the range 29 fm(-2) ≤ Q2 ≤ 77 fm(-2) from elastic electron scattering, detecting 4He recoil nuclei and electrons in coincidence with the high resolution spectrometers of the Hall A Facility of Jefferson Lab. The measurements have uncovered a second diffraction minimum for the form factor, which was predicted in the Q2 range of this experiment. The data are in qualitative agreement with theoretical calculations based on realistic interactions and accurate methods to solve the few-body problem.
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Affiliation(s)
- A Camsonne
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | | | - M Olson
- St. Norbert College, De Pere, Wisconsin 54115, USA
| | - N Sparveris
- Kent State University, Kent, Ohio 44242, USA and Temple University, Philadelphia, Pennsylvania 19122, USA
| | - A Acha
- Florida International University, Miami, Florida 33199, USA
| | - K Allada
- University of Kentucky, Lexington, Kentucky 40506, USA
| | | | - J Arrington
- Argonne National Laboratory, Argonne, Illinois 60439, USA
| | - A Baldwin
- Kent State University, Kent, Ohio 44242, USA
| | - J-P Chen
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - S Choi
- Seoul National University, Seoul 151-747, Korea
| | - E Chudakov
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - E Cisbani
- Istituto Nazionale di Fisica Nucleare, Sezione di Roma, 00185 Rome, Italy and Istituto Superiore di Sanitá, 00161 Rome, Italy
| | - B Craver
- University of Virginia, Charlottesville, Virginia 22901, USA
| | - P Decowski
- Smith College, Northampton, Massachusetts 01063, USA
| | - C Dutta
- University of Kentucky, Lexington, Kentucky 40506, USA
| | - E Folts
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - S Frullani
- Istituto Nazionale di Fisica Nucleare, Sezione di Roma, 00185 Rome, Italy and Istituto Superiore di Sanitá, 00161 Rome, Italy
| | - F Garibaldi
- Istituto Nazionale di Fisica Nucleare, Sezione di Roma, 00185 Rome, Italy and Istituto Superiore di Sanitá, 00161 Rome, Italy
| | - R Gilman
- Rutgers, The State University of New Jersey, Piscataway, New Jersey 08855, USA and Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - J Gomez
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - B Hahn
- College of William and Mary, Williamsburg, Virginia 23185, USA
| | - J-O Hansen
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - D W Higinbotham
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - T Holmstrom
- Longwood University, Farmville, Virginia 23909, USA
| | - J Huang
- Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - M Iodice
- Istituto Nazionale di Fisica Nucleare, Sezione di Roma Tre, 00146 Rome, Italy
| | - X Jiang
- Rutgers, The State University of New Jersey, Piscataway, New Jersey 08855, USA
| | - A Kelleher
- College of William and Mary, Williamsburg, Virginia 23185, USA
| | | | - A Kievsky
- Istituto Nazionale di Fisica Nucleare, Sezione di Pisa, 56127 Pisa, Italy
| | - E Kuchina
- Rutgers, The State University of New Jersey, Piscataway, New Jersey 08855, USA
| | - G Kumbartzki
- Rutgers, The State University of New Jersey, Piscataway, New Jersey 08855, USA
| | - B Lee
- Seoul National University, Seoul 151-747, Korea
| | - J J LeRose
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - R A Lindgren
- University of Virginia, Charlottesville, Virginia 22901, USA
| | - G Lott
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - H Lu
- University of Science and Technology of China, Hefei, Anhui 230026, People's Republic of China
| | - L E Marcucci
- Istituto Nazionale di Fisica Nucleare, Sezione di Pisa, 56127 Pisa, Italy and University of Pisa, 56127 Pisa, Italy
| | - D J Margaziotis
- California State University, Los Angeles, California 90032, USA
| | - P Markowitz
- Florida International University, Miami, Florida 33199, USA
| | - S Marrone
- Istituto Nazionale di Fisica Nucleare, Sezione di Bari and University of Bari, 70126 Bari, Italy
| | - D Meekins
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - Z-E Meziani
- Temple University, Philadelphia, Pennsylvania 19122, USA
| | - R Michaels
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - B Moffit
- Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - B Norum
- University of Virginia, Charlottesville, Virginia 22901, USA
| | | | - A Puckett
- Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - X Qian
- Duke University (TUNL), Durham, North Carolina 27708, USA
| | - O Rondon
- University of Virginia, Charlottesville, Virginia 22901, USA
| | - A Saha
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - B Sawatzky
- Temple University, Philadelphia, Pennsylvania 19122, USA
| | - J Segal
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - M Shabestari
- University of Virginia, Charlottesville, Virginia 22901, USA
| | - A Shahinyan
- Yerevan Physics Institute, Yerevan 375036, Armenia
| | - P Solvignon
- Argonne National Laboratory, Argonne, Illinois 60439, USA
| | - R R Subedi
- University of Virginia, Charlottesville, Virginia 22901, USA
| | - R Suleiman
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - V Sulkosky
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - G M Urciuoli
- Istituto Nazionale di Fisica Nucleare, Sezione di Roma, 00185 Rome, Italy
| | - M Viviani
- Istituto Nazionale di Fisica Nucleare, Sezione di Pisa, 56127 Pisa, Italy
| | - Y Wang
- University of Illinois at Urbana Champagne, Urbana, Illinois 61801, USA
| | - B B Wojtsekhowski
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - X Yan
- Seoul National University, Seoul 151-747, Korea
| | - H Yao
- Temple University, Philadelphia, Pennsylvania 19122, USA
| | - W-M Zhang
- Kent State University, Kent, Ohio 44242, USA
| | - X Zheng
- University of Virginia, Charlottesville, Virginia 22901, USA
| | - L Zhu
- University of Illinois at Urbana Champagne, Urbana, Illinois 61801, USA
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19
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Viviani M, Girlanda L, Kievsky A, Marcucci LE. Effect of three-nucleon interactions in p-(3)He elastic scattering. Phys Rev Lett 2013; 111:172302. [PMID: 24206480 DOI: 10.1103/physrevlett.111.172302] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/19/2013] [Indexed: 06/02/2023]
Abstract
We present a detailed study of the effect of different three-nucleon interactions in p-(3)He elastic scattering at low energies. In particular, two interactions have been considered: one derived from effective field theory at next-to-next-to-leading order and one derived from a more phenomenological point of view-the so-called Illinois model. The four-nucleon scattering observables are calculated by using the Kohn variational principle and the hyperspherical harmonics technique, and the results are compared with available experimental data. We have found that the inclusion of both interactions improves the agreement with the experimental data, in particular, for the proton vector analyzing power.
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Affiliation(s)
- M Viviani
- Istituto Nazionale di Fisica Nucleare, Sezione di Pisa, Largo Bruno Pontecorvo 3, I-56127 Pisa, Italy
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20
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Abstract
The astrophysical S factor for proton-proton weak capture is calculated in chiral effective field theory over the center-of-mass relative-energy range 0-100 keV. The chiral two-nucleon potential derived up to next-to-next-to-next-to leading order is augmented by the full electromagnetic interaction including, beyond Coulomb, two-photon and vacuum-polarization corrections. The low-energy constants entering the weak current operators are fixed so as to reproduce the A=3 binding energies and magnetic moments and the Gamow-Teller matrix element in tritium β decay. Contributions from S and P partial waves in the incoming two-proton channel are retained. The S factor at zero energy is found to be S(0)=(4.030±0.006)×10(-23) MeV fm(2), with a P-wave contribution of 0.020×10(-23) MeV fm(2). The theoretical uncertainty is due to the fitting procedure of the low-energy constants and to the cutoff dependence.
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Affiliation(s)
- L E Marcucci
- Department of Physics, University of Pisa, 56127 Pisa, Italy and INFN-Pisa, 56127 Pisa, Italy
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21
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Frederico T, Salmè G, Viviani M. Two-body scattering states in Minkowski space and the Nakanishi integral representation onto the null plane. Int J Clin Exp Med 2012. [DOI: 10.1103/physrevd.85.036009] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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22
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Marcucci LE, Kievsky A, Rosati S, Schiavilla R, Viviani M. Chiral effective field theory predictions for muon capture on deuteron and {3}He. Phys Rev Lett 2012; 108:052502. [PMID: 22400928 DOI: 10.1103/physrevlett.108.052502] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/26/2011] [Indexed: 05/31/2023]
Abstract
The muon-capture reactions {2}H(μ{-},ν{μ})nn and {3}He(μ{-},ν{μ}){3}H are studied with nuclear potentials and charge-changing weak currents, derived in chiral effective field theory. The low-energy constants (LECs) c{D} and c{E}, present in the three-nucleon potential and (c{D}) axial-vector current, are constrained to reproduce the A=3 binding energies and the triton Gamow-Teller matrix element. The muon-capture rates on deuteron and {3}He are predicted to be 399±3 sec{-1} and 1494±21 sec{-1}, respectively. The spread accounts for the cutoff sensitivity, as well as uncertainties in the LECs and electroweak radiative corrections. By comparing the calculated and precisely measured rates on {3}He, a value for the induced pseudoscalar form factor is obtained in good agreement with the chiral perturbation theory prediction.
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Affiliation(s)
- L E Marcucci
- Department of Physics, University of Pisa, 56127 Pisa, Italy and INFN-Pisa, 56127 Pisa, Italy
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23
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Girlanda L, Kievsky A, Marcucci LE, Pastore S, Schiavilla R, Viviani M. Thermal neutron captures on d and 3He. Phys Rev Lett 2010; 105:232502. [PMID: 21231454 DOI: 10.1103/physrevlett.105.232502] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2010] [Indexed: 05/30/2023]
Abstract
We report on a study of the nd and n(3)He radiative captures at thermal neutron energies, using wave functions obtained from either chiral or conventional two- and three-nucleon realistic potentials with the hyperspherical-harmonics method, and electromagnetic currents derived in chiral effective field theory up to one loop. The predicted nd and n(3)He cross sections are in good agreement with data, but exhibit a significant dependence on the input Hamiltonian. A comparison is also made between these and new results for the nd and n(3)He cross sections obtained in the conventional framework for both potentials and currents.
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Affiliation(s)
- L Girlanda
- Department of Physics, University of Pisa, 56127 Pisa, Italy
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24
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Viviani M, Van Saene HKF, Pisa F, Lucangelo U, Silvestri L, Momesso E, Berlot G. The role of admission surveillance cultures in patients requiring prolonged mechanical ventilation in the intensive care unit. Anaesth Intensive Care 2010; 38:325-35. [PMID: 20369767 DOI: 10.1177/0310057x1003800215] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
We undertook a prospective observational cohort study in intensive care unit (ICU) patients requiring mechanical ventilation for four days or more to evaluate normal and abnormal bacterial carriage on admission detected by surveillance cultures of throat and rectum. We assessed the importance of surveillance and diagnostic cultures for the early detection of resistance to third generation cephalosporins employed as the parenteral component of the selective decontamination of the digestive tract. Finally, we sought the risk factors of abnormal carriage on admission to the ICU. During the 58-month study 621 patients were included: 186 patients (30%) carried abnormal flora including methicillin-resistant Staphylococcus aureus (MRSA) and aerobic Gram negative bacilli (AGNB) on admission to the ICU Both MRSA and AGNB carriers were more commonly present in the hospital group of patients than in patients referred from the community (P < 0.001), although overgrowth was equally present both in community and in hospital patients. The incidence of infections during ICU stay was higher in abnormal (n=120, 64.5%) than in normal carriers (n=185, 42.5%) (P < 0.0001), with an odds ratio of 2.46 (95% confidence interval 1.72 to 3.51). Third generation cephalosporins covered ICU admission flora in 482 (78%) of the studied population. AGNB resistant to cephalosporins and MRSA were detected in surveillance cultures of 139 patients (22%), while the same resistant micro-organisms were identified only in 49 diagnostic samples (7.9%). Parenteral cephalosporins were modified in patients with abnormal flora (P < 0.0001). One hundred and ninety-six patients received antibiotics before admission to the ICU and 42% carried AGNB resistant to cephalosporins. Previous antibiotic use was the only risk factor for abnormal carriage in the multivariate analysis (OR 3.5; 95% confidence interval 2.1 to 5.8). The knowledge of carriage on admission using surveillance cultures may help intensivists to identify patients with abnormal carriage on admission and resistant bacterial strains at an early stage even when diagnostic samples are negative. Third generation cephalosporins covered admission flora in about 80% of the enrolled population and were modified in patients with abnormal flora who received antibiotic therapy before ICU admission. Our finding of overgrowth present on admission may justify the immediate administration of enteral antimicrobials.
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Affiliation(s)
- M Viviani
- Department ofAnaesthesia, Intensive Care and Emergency, Company University Hospital, Hospitals Meeting of Trieste, University of Trieste, Cattinara Hospital, Italy
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Viviani M, Girlanda L, Kievsky A, Marcucci L, Rosati S. Proton-3He elastic scattering at low energies and the “AyPuzzle”. EPJ Web of Conferences 2010. [DOI: 10.1051/epjconf/20100305011] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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26
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Girlanda L, Pastore S, Schiavilla R, Viviani M. Electromagnetic Structure and Reactions of Few-Nucleon Systems in χEFT. EPJ Web of Conferences 2010. [DOI: 10.1051/epjconf/20100301004] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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27
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Pagano L, Valentini CG, Posteraro B, Girmenia C, Ossi C, Pan A, Candoni A, Nosari A, Riva M, Cattaneo C, Rossini F, Fianchi L, Caira M, Sanguinetti M, Gesu GP, Lombardi G, Vianelli N, Stanzani M, Mirone E, Pinsi G, Facchetti F, Manca N, Savi L, Mettimano M, Selva V, Caserta I, Scarpellini P, Morace G, D'Arminio Monforte A, Grossi P, Giudici D, Tortorano AM, Bonini A, Ricci L, Picardi M, Rossano F, Fanci R, Pecile P, Fumagalli L, Ferrari L, Capecchi PL, Romano C, Busca A, Barbui A, Garzia M, Minniti RR, Farina G, Montagna MT, Bruno F, Morelli O, Chierichini A, Placanica PM, Castagnola E, Bandettini R, Giordano S, Monastero R, Tosti ME, Rossi MR, Spedini P, Piane R, Nucci M, Pallavicini F, Bassetti M, Cristini F, LA Sorda M, Viviani M. Zygomycosis in Italy: a survey of FIMUA-ECMM (Federazione Italiana di Micopatologia Umana ed Animale and European Confederation of Medical Mycology). J Chemother 2009; 21:322-9. [PMID: 19567354 DOI: 10.1179/joc.2009.21.3.322] [Citation(s) in RCA: 65] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
Abstract
The aims of the study were to analyze the clinical and epidemiological characteristics and treatments for patients who developed zygomycosis enrolled in Italy during the European Confederation of Medical Mycology of medical mycology survey. This prospective multicenter study was performed between 2004 and 2007 at 49 italian Departments. 60 cases of zygomycosis were enrolled: the median age was 59.5 years (range 1-87), with a prevalence of males (70%). The majority of cases were immunocompromised patients (42 cases, 70%), mainly hematological malignancies (37). Among non-immunocompromised (18 cases, 30%), the main category was represented by patients with penetrating trauma (7/18, 39%). The most common sites of infection were sinus (35%) with/without CNS involvement, lung alone (25%), skin (20%), but in 11 cases (18%) dissemination was observed. According to EORTC criteria, the diagnosis of zygomycosis was proven in 46 patients (77%) and in most of them it was made in vivo (40/46 patients, 87%); in the remaining 14 cases (23%) the diagnosis was probable. 51 patients received antifungal therapy and in 30 of them surgical debridement was also performed. The most commonly used antifungal drug was liposomal amphotericin B (L-AmB), administered in 44 patients: 36 of these patients (82%) responded to therapy. Altogether an attributable mortality rate of 32% (19/60) was registered, which was reduced to 18% in patients treated with L-AmB (8/44). Zygomycosis is a rare and aggressive filamentous fungal infection, still associated with a high mortality rate. This study indicates an inversion of this trend, with a better prognosis and significantly lower mortality than that reported in the literature. It is possible that new extensive, aggressive diagnostic and therapeutic procedures, such as the use of L-AmB and surgery, have improved the prognosis of these patients.
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Affiliation(s)
- L Pagano
- Instituto di Ematologia, Università Cattolica del Sacro Cuore, Roma.
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Barletta P, Romero-Redondo C, Kievsky A, Viviani M, Garrido E. Integral relations for three-body continuum states with the adiabatic expansion. Phys Rev Lett 2009; 103:090402. [PMID: 19792768 DOI: 10.1103/physrevlett.103.090402] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/13/2009] [Indexed: 05/28/2023]
Abstract
The application of the hyperspherical adiabatic expansion to describe three-body scattering states suffers from the problem of very slow convergence. Contrary to what happens for bound states, a huge number of hyper-radial equations has to be solved, and even if done, the extraction of the scattering amplitude is problematic. In this Letter we show how to obtain accurate scattering phase shifts using the hyperspherical adiabatic expansion. To this aim two integral relations, derived from the Kohn variational principle, are used. The convergence of this procedure is as fast as for bound states.
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Affiliation(s)
- P Barletta
- Department of Physics and Astronomy, University College London, London WC1E 6BT, United Kingdom
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Vladikova D, Stoynov Z, Barbucci A, Viviani M, Carpanese P, Kilner J, Skinner S, Rudkin R. Impedance studies of cathode/electrolyte behaviour in SOFC. Electrochim Acta 2008. [DOI: 10.1016/j.electacta.2007.11.037] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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30
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Viviani M, Silvestri L, Van Saene HKF, Zandstra DF, Berlot G, Gullo A. My brother has severe sepsis. Should he receive selective decontamination of the digestive tract (SDD)? Minerva Anestesiol 2008; 74:507. [PMID: 18762757] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
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31
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Viviani M, Schiavilla R, Kubis B, Lewis R, Girlanda L, Kievsky A, Marcucci LE, Rosati S. Isospin mixing in the nucleon and 4He and the nucleon strange electric form factor. Phys Rev Lett 2007; 99:112002. [PMID: 17930429 DOI: 10.1103/physrevlett.99.112002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/15/2007] [Indexed: 05/25/2023]
Abstract
In order to isolate the contribution of the nucleon strange electric form factor to the parity-violating asymmetry measured in 4He(e-->],e')4He experiments, it is crucial to have a reliable estimate of the magnitude of isospin-symmetry-breaking (ISB) corrections in both the nucleon and 4He. We examine this issue in the present Letter. Isospin admixtures in the nucleon are determined in chiral perturbation theory, while those in 4He are derived from nuclear interactions, including explicit ISB terms. A careful analysis of the model dependence in the resulting predictions for the nucleon and nuclear ISB contributions to the asymmetry is carried out. We conclude that, at the low momentum transfers of interest in recent measurements reported by the HAPPEX Collaboration at Jefferson Lab, these contributions are of comparable magnitude to those associated with strangeness components in the nucleon electric form factor.
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Affiliation(s)
- M Viviani
- INFN, Sezione di Pisa, and Department of Physics, University of Pisa, I-56127 Pisa, Italy
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Gullo A, Iscra F, Di Capua G, Berlot G, Lucangelo U, Peratoner A, Fasiolo S, Viviani M, Consales C, Zicari A. Systemic and organ dysfunction response during infusion of recombinant human activated protein C (rhAPC) in severe sepsis and septic shock. Minerva Anestesiol 2005; 71:785-801. [PMID: 16288186] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
AIM The aim of this study was the assessment of the efficacy of recombinant human activated protein C (rhAPC) in septic patients. METHODS A continuous observational prospective study on ICU patients with severe sepsis and septic shock was carried out. Applying the inclusion criteria of a national trial on the use of rhAPC, 15 patients (12 males and 3 females) were enrolled, mean age was 65.9 (SD 9.6), APACHE II score was > or =25. The following variables were assessed on 7 time-points (T1-T7): overall SOFA score; organ-specific SOFA score; APACHE II score; PCR, APTT, INR, fibrinogen, platelet count. Wilcoxon's statistical test and Spearman's correlation test (rho coefficient) between the SOFA and APACHE II scores were used. Test results with a P value below 0.05 were deemed significant. RESULTS A significant correlation was identified between the APACHE II and SOFA scores. No significant change was found in Friedman's test and the respiratory, haematological and hepatic SOFA score, whereas cardiovascular, renal and neurological SOFA scores showed a significant trend between the ranks at the 7 time-points (chi2=14; df=6; P=0.029). During rhAPC treatment Friedman's test showed significant changes of PCR values over the 7 time-points (chi2=19.2; df=6; P=0.02). Wilcoxon's test indicated a significant decrease in the values recorded during the T2-T6 period. On day 28, 12 of the 15 patients originally enrolled were still alive. Mortality rate was therefore 20% (CI 95%). CONCLUSIONS RhAPC is the first biological agent approved for the treatment of severe sepsis and septic shock. Our experience is confined to patients with severe sepsis and septic shock, and some severity indexes showed a modulation of the inflammatory processes and haemostatic balance, 2 factors which play a key role in the evolution of sepsis and organ dysfunction.
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Affiliation(s)
- A Gullo
- Department of Perioperative Medicine, Intensive Care and Emergency, Postgraduate School of Anaesthesia and Resuscitation, University of Trieste, Azienda Mista Ospedaliero-Universitaria, Ospedali Riuniti di Trieste, Trieste, Italy.
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Viviani M, van Saene HKF, Dezzoni R, Silvestri L, Di Lenarda R, Berlot G, Gullo A. Control of imported and acquired methicillin-resistant Staphylococcus aureus (MRSA) in mechanically ventilated patients: a dose-response study of enteral vancomycin to reduce absolute carriage and infection. Anaesth Intensive Care 2005; 33:361-72. [PMID: 15973920 DOI: 10.1177/0310057x0503300312] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
This study aimed to quantify the animate source provided by the patients using the concept of "absolute carriage" by multiplying the carrier rate by the level of carriage; and to compare the impact of a low and high dose of an oropharyngeal vancomycin gel on the absolute MRSA carriage and infection. In all, 265 patients were included, 126 were MRSA positive. Fifty-five patients received 2% vancomycin gel during the first year whilst 4% vancomycin gel was given to 50 patients during the second year. Surveillance swabs of throat and rectum were obtained from all eligible patients on admission and then twice weekly. The vancomycin protocol was started as soon as the surveillance cultures were positive for MRSA. Those patients received one gram of enteral vancomycin daily, divided into four doses. During the first year 2% vancomycin gel 4 ml (80 mg) was applied in the oropharynx in four doses in addition to the enteral solution (Group A). During the second year 4% vancomycin gel 4 ml (160 mg) was used (Group B). The absolute carriage was high during both periods: 3.6 for Group A, and 3.2 for Group B. The 4% vancomycin protocol significantly reduced the absolute carriage, compared to the 2% vancomycin protocol: 2.6 versus 1.5 (P < 0.01). Significant reduction in secondary endogenous infections was found in the second year: seven versus 15 patients (P < 0.05). A total of 3,588 microbiological samples were processed. Neither Staphylococcus aureus with intermediate sensitivity to vancomycin (VISA) nor vancomycin-resistant enterococci (VRE) were detected.
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Affiliation(s)
- M Viviani
- Department of Perioperative Medicine, Intensive Care and Emergency, University of Trieste, Cattinara Hospital, Trieste, Italy
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Schiavilla R, Benhar O, Kievsky A, Marcucci LE, Viviani M. Polarization transfer in 4He(e-->,e'p-->)3H: is the ratio G E p/G M p ) modified in the nuclear medium? Phys Rev Lett 2005; 94:072303. [PMID: 15783807 DOI: 10.1103/physrevlett.94.072303] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/06/2004] [Indexed: 05/24/2023]
Abstract
Polarization observables in the (4)He(e-->,e'p-->)(3)H reaction are calculated using accurate three- and four-nucleon bound-state wave functions, a realistic model for the nuclear electromagnetic current operator, and a treatment of final-state interactions with an optical potential. In contrast to earlier studies, no significant discrepancies are found between theory and experiment both for the ratio of transverse to longitudinal polarization transfers and for the induced polarization, when free-nucleon electromagnetic form factors are used in the current operator. The present results challenge the current interpretation of the experimental data in terms of medium-modified form factors.
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Affiliation(s)
- R Schiavilla
- Jefferson Lab, Newport News, Virginia 23606, USA
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Ferrari M, Ravera F, Viviani M, Liggieri L. Characterization of surfactant aggregates at solid–liquid surfaces by atomic force microscopy. Colloids Surf A Physicochem Eng Asp 2004. [DOI: 10.1016/j.colsurfa.2004.08.052] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Buscaglia V, Viviani M, Buscaglia M, Nanni P, Mitoseriu L, Testino A, Stytsenko E, Daglish M, Zhao Z, Nygren M. Nanostructured barium titanate ceramics. POWDER TECHNOL 2004. [DOI: 10.1016/j.powtec.2004.09.016] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Buscaglia MT, Buscaglia V, Ghigna P, Viviani M, Spinolo G, Testino A, Nanni P. Amphoteric behaviour of Er3+dopants in BaTiO3: an Er–LIIIedge EXAFS assessment. Phys Chem Chem Phys 2004. [DOI: 10.1039/b402859g] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Abstract
The incidence of Candida infection has significantly increased over the recent years, becoming the fourth most common pathogens isolated in patients admitted to intensive care units (ICU). Mortality rates ranging between 6 and 38% have been reported to be associated with candidemia. Esophageal surgery may increase the risk of systemic Candida infection in critical patients requiring postoperative ICU admission. The aim of the present study was to assess the prevalence of Candida colonization in patients with esophageal disease undergoing surgery. Between April 1999 and April 2001, 131 patients with esophageal disease and 40 healthy volunteers were prospectively tested for Candida colonization by oral and pharyngeal swab. Candida colonization was significantly more frequent in patients with esophageal disease than in control subjects (38.9 vs 7.5%, P < 0.01); the prevalence was higher in individuals with carcinoma than in those with benign disease (51.8 vs 24%, P < 0.02), and in patients undergoing neoadjuvant chemoradiation therapy compared to those having primary surgery (55.5 vs 34.4%, P < 0.01). These data suggest that Candida colonization of the gastrointestinal tract is common in patients with esophageal disease. Pharmacological attempts to prevent or reduce the magnitude of this event may be worthwhile before surgery. However, the hypothesis that antifungal oral prophylaxis with nonabsorbable drugs may lower the incidence of candidemia in patients with gastrointestinal Candida colonization, especially in those candidates to postoperative ICU admission, should be tested by randomized double-blinded studies.
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Affiliation(s)
- L Bonavina
- Department of Surgical Sciences, University of Milano, Milano, Italy.
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Van Saene HKF, Silvestri L, Petros A, Viviani M, de la Cal MA, Zandstra DF. Comment on "Prevention of severe Candida infections in non-neutropenic, high-risk, critically ill patients," by Garbino et al. Intensive Care Med 2003; 29:1192-3; author reply 1194-5. [PMID: 12756438 DOI: 10.1007/s00134-003-1770-7] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2003] [Accepted: 03/31/2003] [Indexed: 11/28/2022]
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Jongen N, Donnet M, Bowen P, Lemaître J, Hofmann H, Schenk R, Hofmann C, Aoun-Habbache M, Guillemet-Fritsch S, Sarrias J, Rousset A, Viviani M, Buscaglia M, Buscaglia V, Nanni P, Testino A, Herguijuela J. Development of a Continuous Segmented Flow Tubular Reactor and the “Scale-out” Concept – In Search of Perfect Powders. Chem Eng Technol 2003. [DOI: 10.1002/ceat.200390046] [Citation(s) in RCA: 83] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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41
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Xiong F, Dutta D, Xu W, Anderson B, Auberbach L, Averett T, Bertozzi W, Black T, Calarco J, Cardman L, Cates GD, Chai ZW, Chen JP, Choi S, Chudakov E, Churchwell S, Corrado GS, Crawford C, Dale D, Deur A, Djawotho P, Filippone BW, Finn JM, Gao H, Gilman R, Glamazdin AV, Glashausser C, Glöckle W, Golak J, Gomez J, Gorbenko VG, Hansen JO, Hersman FW, Higinbotham DW, Holmes R, Howell CR, Hughes E, Humensky B, Incerti S, de Jager CW, Jensen JS, Jiang X, Jones CE, Jones M, Kahl R, Kamada H, Kievsky A, Kominis I, Korsch W, Kramer K, Kumbartzki G, Kuss M, Lakuriqi E, Liang M, Liyanage N, LeRose J, Malov S, Margaziotis DJ, Martin JW, McCormick K, McKeown RD, McIlhany K, Meziani ZE, Michaels R, Miller GW, Pace E, Pavlin T, Petratos GG, Pomatsalyuk RI, Pripstein D, Prout D, Ransome RD, Roblin Y, Rvachev M, Saha A, Salmè G, Schnee M, Shin T, Slifer K, Souder PA, Strauch S, Suleiman R, Sutter M, Tipton B, Todor L, Viviani M, Vlahovic B, Watson J, Williamson CF, Witała H, Wojtsekhowski B, Yeh J, Zołnierczuk P. Precision measurement of the spin-dependent asymmetry in the threshold region of 3He(e, e'). Phys Rev Lett 2001; 87:242501. [PMID: 11736498 DOI: 10.1103/physrevlett.87.242501] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/01/2001] [Indexed: 05/23/2023]
Abstract
We present the first precision measurement of the spin-dependent asymmetry in the threshold region of 3He(e,e') at Q2 values of 0.1 and 0.2 (GeV/c)2. The agreement between the data and nonrelativistic Faddeev calculations which include both final-state interactions and meson-exchange current effects is very good at Q2 = 0.1 (GeV/c)2, while a small discrepancy at Q2 = 0.2 (GeV/c)2 is observed.
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Affiliation(s)
- F Xiong
- Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
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Viviani M, Kievsky A, Rosati S, George EA, Knutson LD. The A(y) problem for p-3He elastic scattering. Phys Rev Lett 2001; 86:3739-3742. [PMID: 11329312 DOI: 10.1103/physrevlett.86.3739] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/17/2000] [Indexed: 05/23/2023]
Abstract
We present evidence that numerically accurate quantum calculations employing modern internucleon forces do not reproduce the proton analyzing power, A(y), for p- 3He elastic scattering at low energies. These calculations underpredict new measured analyzing powers by approximately 30% at E(c.m.) = 1.20 MeV and by 40% at E(c.m.) = 1.69 MeV, an effect analogous to a well-known problem in p-d and n-d scattering. The calculations are performed using the complex Kohn variational principle and the (correlated) hyperspherical harmonics technique with full treatment of the Coulomb force. The inclusion of the three-nucleon interaction does not improve the agreement with the experimental data.
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Affiliation(s)
- M Viviani
- INFN, Sezione di Pisa, I-56100 Pisa, Italy
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Xu W, Dutta D, Xiong F, Anderson B, Auberbach L, Averett T, Bertozzi W, Black T, Calarco J, Cardman L, Cates GD, Chai ZW, Chen JP, Choi S, Chudakov E, Churchwell S, Corrado GS, Crawford C, Dale D, Deur A, Djawotho P, Filippone BW, Finn JM, Gao H, Gilman R, Glamazdin AV, Glashausser C, Glöckle W, Golak J, Gomez J, Gorbenko VG, Hansen JO, Hersman FW, Higinbotham DW, Holmes R, Howell CR, Hughes E, Humensky B, Incerti S, de Jager CW, Jensen JS, Jiang X, Jones CE, Jones M, Kahl R, Kamada H, Kievsky A, Kominis I, Korsch W, Kramer K, Kumbartzki G, Kuss M, Lakuriqi E, Liang M, Liyanage N, LeRose J, Malov S, Margaziotis DJ, Martin JW, McCormick K, McKeown RD, McIlhany K, Meziani ZE, Michaels R, Miller GW, Pace E, Pavlin T, Petratos GG, Pomatsalyuk RI, Pripstein D, Prout D, Ransome RD, Roblin Y, Rvachev M, Saha A, Salmè G, Schnee M, Shin T, Slifer K, Souder PA, Strauch S, Suleiman R, Sutter M, Tipton B, Todor L, Viviani M, Vlahovic B, Watson J, Williamson CF, Witała H, Wojtsekhowski B, Yeh J, Zołnierczuk P. Transverse asymmetry AT' from the quasielastic 3He(e,e') process and the neutron magnetic form factor. Phys Rev Lett 2000; 85:2900-2904. [PMID: 11005963 DOI: 10.1103/physrevlett.85.2900] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/24/2000] [Indexed: 05/23/2023]
Abstract
We have measured the transverse asymmetry A(T') in 3He(e,e(')) quasielastic scattering in Hall A at Jefferson Laboratory with high precision for Q2 values from 0.1 to 0.6 (GeV/c)(2). The neutron magnetic form factor G(n)(M) was extracted based on Faddeev calculations for Q2 = 0.1 and 0.2 (GeV/c)(2) with an experimental uncertainty of less than 2%.
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Affiliation(s)
- W Xu
- Massachusetts Institute of Technology, Cambridge, Massuchusetts 02139, USA
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Marcucci LE, Schiavilla R, Viviani M, Kievsky A, Rosati S. Realistic calculation of the 3He + p (hep) astrophysical factor. Phys Rev Lett 2000; 84:5959-5962. [PMID: 10991098 DOI: 10.1103/physrevlett.84.5959] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/29/2000] [Indexed: 05/23/2023]
Abstract
The astrophysical factor for the proton weak capture on 3He is calculated with correlated hyperspherical harmonic wave functions corresponding to a realistic Hamiltonian consisting of the Argonne v(18) two-nucleon and Urbana-IX three-nucleon interactions. The nuclear weak current has vector and axial-vector components with one- and many-body terms. All possible transitions connecting any of the p 3He S- and P-wave channels to 4He are considered. The S factor at a p 3He center-of-mass energy of 10 keV is predicted to be 10. 1x10(-20) keV b, a factor of approximately 4.5 larger than the value adopted in the standard solar model. The P-wave transitions are found to contribute about 40% of the calculated S factor.
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Affiliation(s)
- L E Marcucci
- Department of Physics, Old Dominion University, Norfolk, Virginia 23529, USA
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Abstract
We describe a case of a severely mentally disabled patient diagnosed as suffering from Guillain-Barré syndrome and treated with repeated plasma exchange. However, the abrupt onset of a cardiovascular collapse prompted a more in-depth diagnostic workup which demonstrated that the neurologic symptoms were likely to be ascribed to poisoning with heavy metals from a large number of ingested coins and other metallic items.
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Affiliation(s)
- G Berlot
- University of Trieste, Department of Anesthesia and Intensive Care, Cattinara Hospital, 34100, Trieste, Italy.
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Berlot G, Dezzoni R, Viviani M, Silvestri L, Bussani R, Gullo A. Does the length of stay in the intensive care unit influence the diagnostic accuracy? A clinical-pathological study. Eur J Emerg Med 1999; 6:227-31. [PMID: 10622388] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/15/2023]
Abstract
To evaluate the rate of diagnostic errors leading to preventable deaths among patients admitted to our intensive care unit (ICU), we retrospectively reviewed the medical and autopsy records of all patients who died in the ICU between 1 January 1991 and 31 December 1993. Excluded were patients with traumatic injuries, cerebrovascular accidents and primary cardiac arrest. According to their length of stay (LOS) in the ICU, patients were subdivided into Group A (LOS 0-24 hours), Group B (LOS > 24 hours-14 days), and Group C (LOS > 14 days). Errors were divided into Type 1 (failure to recognize a treatable life-threatening condition); Type 2 (failure to recognize a life-threatening condition, which treated, however, would unlikely alter the outcome), and Type 3 (failure to recognize a condition unrelated to the outcome). Overall, 159 consecutive patients were enrolled. Type 1 errors were 5% in Group A, 4% in Group B and 9% in Group C. Type 2 errors were 18% in Group A, 34% in Group B, and 30% in Group C. Fully correct diagnoses or Type 3 errors were present in 77% of patients in Group A, 62% of patients in Group B, and 61% of patients in Group C. Clinical errors of any type were not related with the LOS in the ICU or in the hospital, age and the number of underlying chronic diseases.
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Affiliation(s)
- G Berlot
- Department of Anaesthesia and Intensive Care, University of Trieste, Trieste School of Medicine, Cattinara Hospital, Italy
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Viviani M, Berlot G, Poldini F, Silvestri L, Sabadini D, Dezzoni R. [Leptospirosis. Description of a clinical case and review of the literature]. Minerva Anestesiol 1998; 64:465-9. [PMID: 9857629] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/09/2023]
Abstract
Leptospirosis is a world-wide diffused anthropozoonosis due to many strains of Leptospira. Initial symptoms may be mild, although in many cases severe systemic symptoms, including high fever, hypotension, etc. may be present since the beginning. In these latter circumstances, the diagnosis of leptospirosis can be very difficult because of the complexity of clinical picture especially when the history is lacking or incomplete. A case report of a 45 year-old man admitted to the hospital after severe jaundice and fever of unknown origin associated to altered mental status, renal failure and hypoxemia is presented. Because of the presence of septic shock and severe respiratory failure, the patient was transferred to the intensive care unit. The diagnostic hypothesis, based on clinical history, was confirmed by laboratory tests (leptospiral IgM antibodies detection). Therapeutical approach with the use of selected antibiotics (penicillin 24,000,000 U for day) and therapy of septic shock led to improvement of the patient's clinical conditions who was then transferred to a regular medical ward.
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Affiliation(s)
- M Viviani
- Cattedra di Terapia Intensiva, Università degli Studi, Trieste
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Viviani M, Soiat M, Poldini F, Berlot G, Silvestri L, Gullo A. [Use of the laryngeal mask in general anesthesia. Clinical experience]. Minerva Anestesiol 1996; 62:349-55. [PMID: 9102584] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
GOAL OF THE STUDY To evaluate the use of the laryngeal mask during general anesthesia. STUDY DESIGN We prospectively studied patients undergoing surgery with general anesthesia in spontaneous breathing. ENVIRONMENT Urologic and general surgical ward, with standard monitoring equipment. PATIENTS We studied consecutively 100 patients (ASA 1-3, 80 males, 20 females, age 64 +/- 15 years, range 19-98 years); 59 patients had a preexisting cardiopulmonary or metabolic disease. Monitoring included ECG, the arterial pressure (noninvasive), the CO2 capnography (EtCO2), the pulsossimetry (SpO2), the respiratory rate (RR) and the tidal volume/kg (TVi). The double product (DP = heart rate X systolic arterial pressure) was used as an index of cardiac stress. These parameters were recorded at 10-minute intervals throughout the procedure. RESULTS The heart rate, the systolic arterial pressure remained stable during the anesthesia, whereas the DP significantly decreased at t10, t20, t30 and t40. The EtCO2 decreased slightly (from 41 +/- 6 to a 36 +/- 4 mmHg; p.n.s.), SpO2 did not change (from 97 +/- 2% to 96 +/- 2%; p:n.s.). The RR significantly increased at t30 and t40 and the TVi significantly increased during the first hour. No relevant complications have been reported. CONCLUSIONS Anesthesia with laryngeal mask was not associated with any detrimental cardiovascular and respiratory effect.
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Affiliation(s)
- M Viviani
- Istituto Polidisciplinare di Anestesia, Rianimazione e Terapia Antalgica-Trieste
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Viviani M, Schiavilla R, Kievsky A. Theoretical study of the radiative capture reactions 2H(n, gamma )3H and 2H(p, gamma )3He at low energies. Phys Rev C Nucl Phys 1996; 54:534-553. [PMID: 9971376 DOI: 10.1103/physrevc.54.534] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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Berlot G, Nicolazzi G, Viviani M, Tomasini A, Bussani R. Massive cerebral venous thrombosis associated with the bilateral catheterization of the internal jugular veins: a case report. Eur J Neurol 1996. [DOI: 10.1111/j.1468-1331.1996.tb00232.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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