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Kegel S, Achenbach P, Bacca S, Barnea N, Beričič J, Bosnar D, Correa L, Distler MO, Esser A, Fonvieille H, Friščić I, Heilig M, Herrmann P, Hoek M, Klag P, Kolar T, Leidemann W, Merkel H, Mihovilovič M, Müller J, Müller U, Orlandini G, Pochodzalla J, Schlimme BS, Schoth M, Schulz F, Sfienti C, Širca S, Spreckels R, Stöttinger Y, Thiel M, Tyukin A, Walcher T, Weber A. Measurement of the α-Particle Monopole Transition Form Factor Challenges Theory: A Low-Energy Puzzle for Nuclear Forces? Phys Rev Lett 2023; 130:152502. [PMID: 37115897 DOI: 10.1103/physrevlett.130.152502] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/20/2021] [Revised: 10/06/2022] [Accepted: 01/26/2023] [Indexed: 06/19/2023]
Abstract
We perform a systematic study of the α-particle excitation from its ground state 0_{1}^{+} to the 0_{2}^{+} resonance. The so-called monopole transition form factor is investigated via an electron scattering experiment in a broad Q^{2} range (from 0.5 to 5.0 fm^{-2}). The precision of the new data dramatically supersedes that of older sets of data, each covering only a portion of the Q^{2} range. The new data allow the determination of two coefficients in a low-momentum expansion, leading to a new puzzle. By confronting experiment to state-of-the-art theoretical calculations, we observe that modern nuclear forces, including those derived within chiral effective field theory that are well tested on a variety of observables, fail to reproduce the excitation of the α particle.
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Affiliation(s)
- S Kegel
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, D-55099 Mainz, Germany
| | - P Achenbach
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, D-55099 Mainz, Germany
| | - S Bacca
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, D-55099 Mainz, Germany
- Helmholtz-Institut Mainz, Johannes Gutenberg-Universität Mainz, D-55099 Mainz, Germany
| | - N Barnea
- Racah Institute of Physics, Hebrew University, 91904 Jerusalem, Israel
| | - J Beričič
- Jožef Stefan Institute, SI-1000 Ljubljana, Slovenia
| | - D Bosnar
- Department of Physics, Faculty of Science, University of Zagreb, 10000 Zagreb, Croatia
| | - L Correa
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, D-55099 Mainz, Germany
- Université Clermont Auvergne, CNRS/IN2P3, LPC, F-63000 Clermont-Ferrand, France
| | - M O Distler
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, D-55099 Mainz, Germany
| | - A Esser
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, D-55099 Mainz, Germany
| | - H Fonvieille
- Université Clermont Auvergne, CNRS/IN2P3, LPC, F-63000 Clermont-Ferrand, France
| | - I Friščić
- Department of Physics, Faculty of Science, University of Zagreb, 10000 Zagreb, Croatia
| | - M Heilig
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, D-55099 Mainz, Germany
| | - P Herrmann
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, D-55099 Mainz, Germany
| | - M Hoek
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, D-55099 Mainz, Germany
| | - P Klag
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, D-55099 Mainz, Germany
| | - T Kolar
- Jožef Stefan Institute, SI-1000 Ljubljana, Slovenia
- Faculty of Mathematics and Physics, University of Ljubljana, SI-1000 Ljubljana, Slovenia
| | - W Leidemann
- Dipartimento di Fisica, Università di Trento, Via Sommarive 14, I-38123 Trento, Italy
- Instituto Nazionale di Fisica Nucleare, TIFPA, Via Sommarive 14, I-38123 Trento, Italy
| | - H Merkel
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, D-55099 Mainz, Germany
| | - M Mihovilovič
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, D-55099 Mainz, Germany
- Jožef Stefan Institute, SI-1000 Ljubljana, Slovenia
| | - J Müller
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, D-55099 Mainz, Germany
| | - U Müller
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, D-55099 Mainz, Germany
| | - G Orlandini
- Dipartimento di Fisica, Università di Trento, Via Sommarive 14, I-38123 Trento, Italy
- Instituto Nazionale di Fisica Nucleare, TIFPA, Via Sommarive 14, I-38123 Trento, Italy
| | - J Pochodzalla
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, D-55099 Mainz, Germany
| | - B S Schlimme
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, D-55099 Mainz, Germany
| | - M Schoth
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, D-55099 Mainz, Germany
| | - F Schulz
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, D-55099 Mainz, Germany
| | - C Sfienti
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, D-55099 Mainz, Germany
| | - S Širca
- Jožef Stefan Institute, SI-1000 Ljubljana, Slovenia
- Faculty of Mathematics and Physics, University of Ljubljana, SI-1000 Ljubljana, Slovenia
| | - R Spreckels
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, D-55099 Mainz, Germany
| | - Y Stöttinger
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, D-55099 Mainz, Germany
| | - M Thiel
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, D-55099 Mainz, Germany
| | - A Tyukin
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, D-55099 Mainz, Germany
| | - T Walcher
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, D-55099 Mainz, Germany
| | - A Weber
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, D-55099 Mainz, Germany
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2
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Cruz-Torres R, Nguyen D, Hauenstein F, Schmidt A, Li S, Abrams D, Albataineh H, Alsalmi S, Androic D, Aniol K, Armstrong W, Arrington J, Atac H, Averett T, Ayerbe Gayoso C, Bai X, Bane J, Barcus S, Beck A, Bellini V, Benmokhtar F, Bhatt H, Bhetuwal D, Biswas D, Blyth D, Boeglin W, Bulumulla D, Camsonne A, Castellanos J, Chen JP, Cohen EO, Covrig S, Craycraft K, Dongwi B, Duer M, Duran B, Dutta D, Fuchey E, Gal C, Gautam TN, Gilad S, Gnanvo K, Gogami T, Golak J, Gomez J, Gu C, Habarakada A, Hague T, Hansen O, Hattawy M, Hen O, Higinbotham DW, Hughes E, Hyde C, Ibrahim H, Jian S, Joosten S, Kamada H, Karki A, Karki B, Katramatou AT, Keppel C, Khachatryan M, Khachatryan V, Khanal A, King D, King P, Korover I, Kutz T, Lashley-Colthirst N, Laskaris G, Li W, Liu H, Liyanage N, Markowitz P, McClellan RE, Meekins D, Mey-Tal Beck S, Meziani ZE, Michaels R, Mihovilovič M, Nelyubin V, Nuruzzaman N, Nycz M, Obrecht R, Olson M, Ou L, Owen V, Pandey B, Pandey V, Papadopoulou A, Park S, Patsyuk M, Paul S, Petratos GG, Piasetzky E, Pomatsalyuk R, Premathilake S, Puckett AJR, Punjabi V, Ransome R, Rashad MNH, Reimer PE, Riordan S, Roche J, Sargsian M, Santiesteban N, Sawatzky B, Segarra EP, Schmookler B, Shahinyan A, Širca S, Skibiński R, Sparveris N, Su T, Suleiman R, Szumila-Vance H, Tadepalli AS, Tang L, Tireman W, Topolnicki K, Tortorici F, Urciuoli G, Weinstein LB, Witała H, Wojtsekhowski B, Wood S, Ye ZH, Ye ZY, Zhang J. Probing Few-Body Nuclear Dynamics via ^{3}H and ^{3}He (e,e^{'}p)pn Cross-Section Measurements. Phys Rev Lett 2020; 124:212501. [PMID: 32530643 DOI: 10.1103/physrevlett.124.212501] [Citation(s) in RCA: 1] [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: 01/29/2020] [Revised: 03/12/2020] [Accepted: 04/30/2020] [Indexed: 06/11/2023]
Abstract
We report the first measurement of the (e,e^{'}p) three-body breakup reaction cross sections in helium-3 (^{3}He) and tritium (^{3}H) at large momentum transfer [⟨Q^{2}⟩≈1.9 (GeV/c)^{2}] and x_{B}>1 kinematics, where the cross section should be sensitive to quasielastic (QE) scattering from single nucleons. The data cover missing momenta 40≤p_{miss}≤500 MeV/c that, in the QE limit with no rescattering, equals the initial momentum of the probed nucleon. The measured cross sections are compared with state-of-the-art ab initio calculations. Overall good agreement, within ±20%, is observed between data and calculations for the full p_{miss} range for ^{3}H and for 100≤p_{miss}≤350 MeV/c for ^{3}He. Including the effects of rescattering of the outgoing nucleon improves agreement with the data at p_{miss}>250 MeV/c and suggests contributions from charge-exchange (SCX) rescattering. The isoscalar sum of ^{3}He plus ^{3}H, which is largely insensitive to SCX, is described by calculations to within the accuracy of the data over the entire p_{miss} range. This validates current models of the ground state of the three-nucleon system up to very high initial nucleon momenta of 500 MeV/c.
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Affiliation(s)
- R Cruz-Torres
- Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - D Nguyen
- Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
- University of Education, Hue University, Hue City, Vietnam
| | - F Hauenstein
- Old Dominion University, Norfolk, Virginia 23529, USA
| | - A Schmidt
- Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - S Li
- University of New Hampshire, Durham, New Hampshire 03824, USA
| | - D Abrams
- University of Virginia, Charlottesville, Virginia 22904, USA
| | - H Albataineh
- Texas A & M University, Kingsville, Texas 78363, USA
| | - S Alsalmi
- King Saud University, Riyadh 11451, Kingdom of Saudi Arabia
| | - D Androic
- University of Zagreb, 10000 Zagreb, Croatia
| | - K Aniol
- California State University, Los Angeles, California 90032, USA
| | - W Armstrong
- Physics Division, Argonne National Laboratory, Lemont, Illinois 60439, USA
| | - J Arrington
- Physics Division, Argonne National Laboratory, Lemont, Illinois 60439, USA
| | - H Atac
- Temple University, Philadelphia, Pennsylvania 19122, USA
| | - T Averett
- The College of William and Mary, Williamsburg, Virginia 23185, USA
| | - C Ayerbe Gayoso
- The College of William and Mary, Williamsburg, Virginia 23185, USA
| | - X Bai
- University of Virginia, Charlottesville, Virginia 22904, USA
| | - J Bane
- University of Tennessee, Knoxville, Tennessee 37966, USA
| | - S Barcus
- The College of William and Mary, Williamsburg, Virginia 23185, USA
| | - A Beck
- Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - V Bellini
- INFN Sezione di Catania, 95123 Catania, Italy
| | - F Benmokhtar
- Duquesne University, Pittsburgh, Pennsylvania 15282, USA
| | - H Bhatt
- Mississippi State University, Mississippi 39762, USA
| | - D Bhetuwal
- Mississippi State University, Mississippi 39762, USA
| | - D Biswas
- Hampton University, Hampton, Virginia 23669, USA
| | - D Blyth
- Physics Division, Argonne National Laboratory, Lemont, Illinois 60439, USA
| | - W Boeglin
- Florida International University, Miami, Florida 33199, USA
| | - D Bulumulla
- Old Dominion University, Norfolk, Virginia 23529, USA
| | - A Camsonne
- Jefferson Lab, Newport News, Virginia 23606, USA
| | - J Castellanos
- Florida International University, Miami, Florida 33199, USA
| | - J-P Chen
- Jefferson Lab, Newport News, Virginia 23606, USA
| | - E O Cohen
- School of Physics and Astronomy, Tel Aviv University, Tel Aviv 69978, Israel
| | - S Covrig
- Jefferson Lab, Newport News, Virginia 23606, USA
| | - K Craycraft
- University of Tennessee, Knoxville, Tennessee 37966, USA
| | - B Dongwi
- Hampton University, Hampton, Virginia 23669, USA
| | - M Duer
- School of Physics and Astronomy, Tel Aviv University, Tel Aviv 69978, Israel
| | - B Duran
- Temple University, Philadelphia, Pennsylvania 19122, USA
| | - D Dutta
- Mississippi State University, Mississippi 39762, USA
| | - E Fuchey
- University of Connecticut, Storrs, Connecticut 06269, USA
| | - C Gal
- University of Virginia, Charlottesville, Virginia 22904, USA
| | - T N Gautam
- Hampton University, Hampton, Virginia 23669, USA
| | - S Gilad
- Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - K Gnanvo
- University of Virginia, Charlottesville, Virginia 22904, USA
| | - T Gogami
- Tohoku University, Sendai, Miyagi 980-8577, Japan
| | - J Golak
- M. Smoluchowski Institute of Physics, Jagiellonian University, PL-30348 Kraków, Poland
| | - J Gomez
- Jefferson Lab, Newport News, Virginia 23606, USA
| | - C Gu
- University of Virginia, Charlottesville, Virginia 22904, USA
| | - A Habarakada
- Hampton University, Hampton, Virginia 23669, USA
| | - T Hague
- Kent State University, Kent, Ohio 44240, USA
| | - O Hansen
- Jefferson Lab, Newport News, Virginia 23606, USA
| | - M Hattawy
- Physics Division, Argonne National Laboratory, Lemont, Illinois 60439, USA
| | - O Hen
- Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | | | - E Hughes
- Columbia University, New York, New York 10027, USA
| | - C Hyde
- Old Dominion University, Norfolk, Virginia 23529, USA
| | - H Ibrahim
- Cairo University, 12613 Cairo, Egypt
| | - S Jian
- University of Virginia, Charlottesville, Virginia 22904, USA
| | - S Joosten
- Temple University, Philadelphia, Pennsylvania 19122, USA
| | - H Kamada
- Department of Physics, Faculty of Engineering, Kyushu Institute of Technology, Kitakyushu 804-8550, Japan
| | - A Karki
- Mississippi State University, Mississippi 39762, USA
| | - B Karki
- Ohio University, Athens, Ohio 45701, USA
| | | | - C Keppel
- Jefferson Lab, Newport News, Virginia 23606, USA
| | - M Khachatryan
- Old Dominion University, Norfolk, Virginia 23529, USA
| | - V Khachatryan
- Stony Brook, State University of New York, New York 11794, USA
| | - A Khanal
- Florida International University, Miami, Florida 33199, USA
| | - D King
- Syracuse University, Syracuse, New York 13244, USA
| | - P King
- Ohio University, Athens, Ohio 45701, USA
| | - I Korover
- Nuclear Research Center-Negev, Beer-Sheva, Israel
| | - T Kutz
- Stony Brook, State University of New York, New York 11794, USA
| | | | - G Laskaris
- Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - W Li
- University of Regina, Regina, SK S4S 0A2, Canada
| | - H Liu
- Columbia University, New York, New York 10027, USA
| | - N Liyanage
- University of Virginia, Charlottesville, Virginia 22904, USA
| | - P Markowitz
- Florida International University, Miami, Florida 33199, USA
| | | | - D Meekins
- Jefferson Lab, Newport News, Virginia 23606, USA
| | - S Mey-Tal Beck
- Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - Z-E Meziani
- Physics Division, Argonne National Laboratory, Lemont, Illinois 60439, USA
- Columbia University, New York, New York 10027, USA
| | - R Michaels
- Jefferson Lab, Newport News, Virginia 23606, USA
| | - M Mihovilovič
- University of Ljubljana, 1000 Ljubljana, Slovenia
- Faculty of Mathematics and Physics, Jožef Stefan Institute, Ljubljana, Slovenia
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, DE-55128 Mainz, Germany
| | - V Nelyubin
- University of Virginia, Charlottesville, Virginia 22904, USA
| | - N Nuruzzaman
- Hampton University, Hampton, Virginia 23669, USA
| | - M Nycz
- Kent State University, Kent, Ohio 44240, USA
| | - R Obrecht
- University of Connecticut, Storrs, Connecticut 06269, USA
| | - M Olson
- Saint Norbert College, De Pere, Wisconsin 54115, USA
| | - L Ou
- Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - V Owen
- The College of William and Mary, Williamsburg, Virginia 23185, USA
| | - B Pandey
- Hampton University, Hampton, Virginia 23669, USA
| | - V Pandey
- Department of Physics, University of Florida, Gainesville, Florida 32611, USA
| | - A Papadopoulou
- Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - S Park
- Stony Brook, State University of New York, New York 11794, USA
| | - M Patsyuk
- Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - S Paul
- The College of William and Mary, Williamsburg, Virginia 23185, USA
| | | | - E Piasetzky
- School of Physics and Astronomy, Tel Aviv University, Tel Aviv 69978, Israel
| | - R Pomatsalyuk
- Institute of Physics and Technology, Kharkov 61108, Ukraine
| | - S Premathilake
- University of Virginia, Charlottesville, Virginia 22904, USA
| | - A J R Puckett
- University of Connecticut, Storrs, Connecticut 06269, USA
| | - V Punjabi
- Norfolk State University, Norfolk, Virginia 23504, USA
| | - R Ransome
- Rutgers University, New Brunswick, New Jersey 08901, USA
| | - M N H Rashad
- Old Dominion University, Norfolk, Virginia 23529, USA
| | - P E Reimer
- Physics Division, Argonne National Laboratory, Lemont, Illinois 60439, USA
| | - S Riordan
- Physics Division, Argonne National Laboratory, Lemont, Illinois 60439, USA
| | - J Roche
- Ohio University, Athens, Ohio 45701, USA
| | - M Sargsian
- Florida International University, Miami, Florida 33199, USA
| | - N Santiesteban
- University of New Hampshire, Durham, New Hampshire 03824, USA
| | - B Sawatzky
- Jefferson Lab, Newport News, Virginia 23606, USA
| | - E P Segarra
- Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - B Schmookler
- Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - A Shahinyan
- Yerevan Physics Institute, 0036 Yerevan, Armenia
| | - S Širca
- University of Ljubljana, 1000 Ljubljana, Slovenia
- Faculty of Mathematics and Physics, Jožef Stefan Institute, SI-1000, Ljubljana, Slovenia
| | - R Skibiński
- M. Smoluchowski Institute of Physics, Jagiellonian University, PL-30348 Kraków, Poland
| | - N Sparveris
- Columbia University, New York, New York 10027, USA
| | - T Su
- Kent State University, Kent, Ohio 44240, USA
| | - R Suleiman
- Jefferson Lab, Newport News, Virginia 23606, USA
| | | | - A S Tadepalli
- Rutgers University, New Brunswick, New Jersey 08901, USA
| | - L Tang
- Jefferson Lab, Newport News, Virginia 23606, USA
| | - W Tireman
- Northern Michigan University, Marquette, Michigan 49855, USA
| | - K Topolnicki
- M. Smoluchowski Institute of Physics, Jagiellonian University, PL-30348 Kraków, Poland
| | - F Tortorici
- INFN Sezione di Catania, 95123 Catania, Italy
| | | | - L B Weinstein
- Old Dominion University, Norfolk, Virginia 23529, USA
| | - H Witała
- M. Smoluchowski Institute of Physics, Jagiellonian University, PL-30348 Kraków, Poland
| | | | - S Wood
- Jefferson Lab, Newport News, Virginia 23606, USA
| | - Z H Ye
- Physics Division, Argonne National Laboratory, Lemont, Illinois 60439, USA
| | - Z Y Ye
- University of Illinois-Chicago, Chicago, Illinois 60607, USA
| | - J Zhang
- Stony Brook, State University of New York, New York 11794, USA
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3
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Beričič J, Correa L, Benali M, Achenbach P, Ayerbe Gayoso C, Bernauer JC, Blomberg A, Böhm R, Bosnar D, Debenjak L, Denig A, Distler MO, Downie EJ, Esser A, Fonvieille H, Friščić I, Kegel S, Kohl Y, Makek M, Merkel H, Middleton DG, Mihovilovič M, Müller U, Nungesser L, Paolone M, Pochodzalla J, Sánchez Majos S, Schlimme BS, Schoth M, Schulz F, Sfienti C, Širca S, Sparveris N, Štajner S, Thiel M, Tyukin A, Weber A, Weinriefer M. New Insight in the Q^{2} Dependence of Proton Generalized Polarizabilities. Phys Rev Lett 2019; 123:192302. [PMID: 31765208 DOI: 10.1103/physrevlett.123.192302] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/24/2019] [Revised: 10/04/2019] [Indexed: 06/10/2023]
Abstract
Virtual Compton scattering on the proton has been investigated at three yet unexplored values of the four-momentum transfer Q^{2}: 0.10, 0.20, and 0.45 GeV^{2}, at the Mainz Microtron. Fits performed using either the low-energy theorem or dispersion relations allowed the extraction of the structure functions P_{LL}-P_{TT}/ε and P_{LT}, as well as the electric and magnetic generalized polarizabilities α_{E1}(Q^{2}) and β_{M1}(Q^{2}). These new results show a smooth and rapid falloff of α_{E1}(Q^{2}), in contrast to previous measurements at Q^{2}=0.33 GeV^{2}, and provide for the first time a precise mapping of β_{M1}(Q^{2}) in the low-Q^{2} region.
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Affiliation(s)
- J Beričič
- Jožef Stefan Institute, SI-1000 Ljubljana, Slovenia
| | - L Correa
- Université Clermont Auvergne, CNRS/IN2P3, LPC, F-63000 Clermont-Ferrand, France
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, D-55099 Mainz, Germany
| | - M Benali
- Université Clermont Auvergne, CNRS/IN2P3, LPC, F-63000 Clermont-Ferrand, France
| | - P Achenbach
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, D-55099 Mainz, Germany
| | - C Ayerbe Gayoso
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, D-55099 Mainz, Germany
| | - J C Bernauer
- Department of Physics and Astronomy, Stony Brook University, SUNY, Stony Brook, New York 11794-3800, USA
- RIKEN BNL Research Center, Brookhaven National Laboratory, Upton, New York 11973-5000, USA
| | - A Blomberg
- Temple University, Philadelphia, Pennsylvania 19122, USA
| | - R Böhm
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, D-55099 Mainz, Germany
| | - D Bosnar
- Department of Physics, Faculty of Science, University of Zagreb, 10000 Zagreb, Croatia
| | - L Debenjak
- Jožef Stefan Institute, SI-1000 Ljubljana, Slovenia
| | - A Denig
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, D-55099 Mainz, Germany
| | - M O Distler
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, D-55099 Mainz, Germany
| | - E J Downie
- Institute for Nuclear Studies, Department of Physics, The George Washington University, Washington, DC 20052, USA
| | - A Esser
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, D-55099 Mainz, Germany
| | - H Fonvieille
- Université Clermont Auvergne, CNRS/IN2P3, LPC, F-63000 Clermont-Ferrand, France
| | - I Friščić
- Laboratory for Nuclear Science, Massachussetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - S Kegel
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, D-55099 Mainz, Germany
| | - Y Kohl
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, D-55099 Mainz, Germany
| | - M Makek
- Department of Physics, Faculty of Science, University of Zagreb, 10000 Zagreb, Croatia
| | - H Merkel
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, D-55099 Mainz, Germany
| | - D G Middleton
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, D-55099 Mainz, Germany
| | - M Mihovilovič
- Jožef Stefan Institute, SI-1000 Ljubljana, Slovenia
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, D-55099 Mainz, Germany
| | - U Müller
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, D-55099 Mainz, Germany
| | - L Nungesser
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, D-55099 Mainz, Germany
| | - M Paolone
- Temple University, Philadelphia, Pennsylvania 19122, USA
| | - J Pochodzalla
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, D-55099 Mainz, Germany
| | - S Sánchez Majos
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, D-55099 Mainz, Germany
| | - B S Schlimme
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, D-55099 Mainz, Germany
| | - M Schoth
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, D-55099 Mainz, Germany
| | - F Schulz
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, D-55099 Mainz, Germany
| | - C Sfienti
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, D-55099 Mainz, Germany
| | - S Širca
- Jožef Stefan Institute, SI-1000 Ljubljana, Slovenia
- Faculty of Mathematics and Physics, University of Ljubljana, SI-1000 Ljubljana, Slovenia
| | - N Sparveris
- Temple University, Philadelphia, Pennsylvania 19122, USA
| | - S Štajner
- Jožef Stefan Institute, SI-1000 Ljubljana, Slovenia
| | - M Thiel
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, D-55099 Mainz, Germany
| | - A Tyukin
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, D-55099 Mainz, Germany
| | - A Weber
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, D-55099 Mainz, Germany
| | - M Weinriefer
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, D-55099 Mainz, Germany
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4
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Esser A, Thiel M, Achenbach P, Aulenbacher K, Baunack S, Beričič J, Bosnar D, Correa L, Dehn M, Distler MO, Fonvieille H, Friščić I, Gorchtein M, Heidrich S, Herrmann P, Hoek M, Kegel S, Kohl Y, Kolar T, Kreidel HJ, Maas FE, Merkel H, Mihovilovič M, Müller J, Müller U, Nillius F, Palatchi C, Paschke KD, Pochodzalla J, Schlimme BS, Schoth M, Schulz F, Širca S, Spruck B, Štajner S, Tioukine V, Tyukin A, Weber A, Sfienti C. First Measurement of the Q^{2} Dependence of the Beam-Normal Single Spin Asymmetry for Elastic Scattering off Carbon. Phys Rev Lett 2018; 121:022503. [PMID: 30085726 DOI: 10.1103/physrevlett.121.022503] [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: 03/13/2018] [Revised: 05/27/2018] [Indexed: 06/08/2023]
Abstract
We report on the first Q^{2}-dependent measurement of the beam-normal single spin asymmetry A_{n} in the elastic scattering of 570 MeV vertically polarized electrons off ^{12}C. We cover the Q^{2} range between 0.02 and 0.05 GeV^{2}/c^{2} and determine A_{n} at four different Q^{2} values. The experimental results are compared to a theoretical calculation that relates A_{n} to the imaginary part of the two-photon exchange amplitude. The result emphasizes that the Q^{2} behavior of A_{n} given by the ratio of the Compton to charge form factors cannot be treated independently of the target nucleus.
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Affiliation(s)
- A Esser
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, D-55099 Mainz, Germany
| | - M Thiel
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, D-55099 Mainz, Germany
| | - P Achenbach
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, D-55099 Mainz, Germany
| | - K Aulenbacher
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, D-55099 Mainz, Germany
| | - S Baunack
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, D-55099 Mainz, Germany
| | - J Beričič
- Jožef Stefan Institute, SI-1000 Ljubljana, Slovenia
| | - D Bosnar
- Department of Physics, Faculty of Science, University of Zagreb, 10000 Zagreb, Croatia
| | - L Correa
- Clermont Université, Université Blaise Pascal, CNRS/IN2P3, LPC, BP 10448, F-63000 Clermont-Ferrand, France
| | - M Dehn
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, D-55099 Mainz, Germany
| | - M O Distler
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, D-55099 Mainz, Germany
| | - H Fonvieille
- Clermont Université, Université Blaise Pascal, CNRS/IN2P3, LPC, BP 10448, F-63000 Clermont-Ferrand, France
| | - I Friščić
- Department of Physics, Faculty of Science, University of Zagreb, 10000 Zagreb, Croatia
| | - M Gorchtein
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, D-55099 Mainz, Germany
| | - S Heidrich
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, D-55099 Mainz, Germany
| | - P Herrmann
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, D-55099 Mainz, Germany
| | - M Hoek
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, D-55099 Mainz, Germany
| | - S Kegel
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, D-55099 Mainz, Germany
| | - Y Kohl
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, D-55099 Mainz, Germany
| | - T Kolar
- Jožef Stefan Institute, SI-1000 Ljubljana, Slovenia
- Department of Physics, University of Ljubljana, SI-1000 Ljubljana, Slovenia
| | - H-J Kreidel
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, D-55099 Mainz, Germany
| | - F E Maas
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, D-55099 Mainz, Germany
| | - H Merkel
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, D-55099 Mainz, Germany
| | - M Mihovilovič
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, D-55099 Mainz, Germany
- Jožef Stefan Institute, SI-1000 Ljubljana, Slovenia
| | - J Müller
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, D-55099 Mainz, Germany
| | - U Müller
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, D-55099 Mainz, Germany
| | - F Nillius
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, D-55099 Mainz, Germany
| | - C Palatchi
- University of Virginia, Charlottesville, Virginia 22903, USA
| | - K D Paschke
- University of Virginia, Charlottesville, Virginia 22903, USA
| | - J Pochodzalla
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, D-55099 Mainz, Germany
| | - B S Schlimme
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, D-55099 Mainz, Germany
| | - M Schoth
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, D-55099 Mainz, Germany
| | - F Schulz
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, D-55099 Mainz, Germany
| | - S Širca
- Jožef Stefan Institute, SI-1000 Ljubljana, Slovenia
- Department of Physics, University of Ljubljana, SI-1000 Ljubljana, Slovenia
| | - B Spruck
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, D-55099 Mainz, Germany
| | - S Štajner
- Jožef Stefan Institute, SI-1000 Ljubljana, Slovenia
| | - V Tioukine
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, D-55099 Mainz, Germany
| | - A Tyukin
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, D-55099 Mainz, Germany
| | - A Weber
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, D-55099 Mainz, Germany
| | - C Sfienti
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, D-55099 Mainz, Germany
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5
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Štajner S, Achenbach P, Beranek T, Beričič J, Bernauer JC, Bosnar D, Böhm R, Correa L, Denig A, Distler MO, Esser A, Fonvieille H, Friedrich JM, Friščić I, Kegel S, Kohl Y, Merkel H, Mihovilovič M, Müller J, Müller U, Nungesser L, Pochodzalla J, Schlimme BS, Schoth M, Schulz F, Sfienti C, Širca S, Thiel M, Tiator L, Tyukin A, Weber A, Yaron I. Beam-Recoil Polarization Measurement of π^{0} Electroproduction on the Proton in the Region of the Roper Resonance. Phys Rev Lett 2017; 119:022001. [PMID: 28753336 DOI: 10.1103/physrevlett.119.022001] [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: 03/15/2017] [Indexed: 06/07/2023]
Abstract
The helicity-dependent recoil proton polarizations P_{x}^{'} and P_{z}^{'} as well as the helicity-independent component P_{y} have been measured in the p(e[over →],e^{'}p[over →])π^{0} reaction at four-momentum transfer Q^{2}≃0.1 GeV^{2}, center-of-mass proton emission angle θ_{p}^{*}≃90°, and invariant mass W≃1440 MeV. This first precise measurement of double-polarization observables in the energy domain of the Roper resonance P_{11}(1440) by exploiting recoil polarimetry has allowed for the extraction of its scalar electroexcitation amplitude at an unprecedentedly low value of Q^{2}, establishing a powerful instrument for probing the interplay of quark and meson degrees of freedom in the nucleon.
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Affiliation(s)
- S Štajner
- Jožef Stefan Institute, SI-1000 Ljubljana, Slovenia
| | - P Achenbach
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, DE-55128 Mainz, Germany
| | - T Beranek
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, DE-55128 Mainz, Germany
| | - J Beričič
- Jožef Stefan Institute, SI-1000 Ljubljana, Slovenia
| | - J C Bernauer
- Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - D Bosnar
- Department of Physics, Faculty of Science, University of Zagreb, HR-10002 Zagreb, Croatia
| | - R Böhm
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, DE-55128 Mainz, Germany
| | - L Correa
- Université Clermont Auvergne, CNRS/IN2P3, LPC, F-63000 Clermont-Ferrand, France
| | - A Denig
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, DE-55128 Mainz, Germany
| | - M O Distler
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, DE-55128 Mainz, Germany
| | - A Esser
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, DE-55128 Mainz, Germany
| | - H Fonvieille
- Université Clermont Auvergne, CNRS/IN2P3, LPC, F-63000 Clermont-Ferrand, France
| | - J M Friedrich
- Technische Universität München, Physik Department, 85748 Garching, Germany
| | - I Friščić
- Department of Physics, Faculty of Science, University of Zagreb, HR-10002 Zagreb, Croatia
| | - S Kegel
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, DE-55128 Mainz, Germany
| | - Y Kohl
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, DE-55128 Mainz, Germany
| | - H Merkel
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, DE-55128 Mainz, Germany
| | - M Mihovilovič
- Jožef Stefan Institute, SI-1000 Ljubljana, Slovenia
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, DE-55128 Mainz, Germany
| | - J Müller
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, DE-55128 Mainz, Germany
| | - U Müller
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, DE-55128 Mainz, Germany
| | - L Nungesser
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, DE-55128 Mainz, Germany
| | - J Pochodzalla
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, DE-55128 Mainz, Germany
| | - B S Schlimme
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, DE-55128 Mainz, Germany
| | - M Schoth
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, DE-55128 Mainz, Germany
| | - F Schulz
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, DE-55128 Mainz, Germany
| | - C Sfienti
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, DE-55128 Mainz, Germany
| | - S Širca
- Jožef Stefan Institute, SI-1000 Ljubljana, Slovenia
- Faculty of Mathematics and Physics, University of Ljubljana, SI-1000 Ljubljana, Slovenia
| | - M Thiel
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, DE-55128 Mainz, Germany
| | - L Tiator
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, DE-55128 Mainz, Germany
| | - A Tyukin
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, DE-55128 Mainz, Germany
| | - A Weber
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, DE-55128 Mainz, Germany
| | - I Yaron
- School of Physics and Astronomy, Tel Aviv University, Tel Aviv 69978, Israel
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Schlimme BS, Achenbach P, Beričič J, Böhm R, Bosnar D, Correa L, Distler M, Esser A, Fonvieille H, Friščić I, Griffioen KA, Huan Y, Kegel S, Kohl Y, Merkel H, Mihovilovič M, Müller J, Müller U, Pochodzalla J, Schoth M, Schulz F, Sfienti C, Širca S, Štajner S, Thiel M, Weber A. Deuteron form factor measurements at low momentum transfers. EPJ Web of Conferences 2016. [DOI: 10.1051/epjconf/201611304017] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [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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7
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Achenbach P, Schulz F, Aulenbacher S, Beričič J, Bleser S, Böhm R, Bosnar D, Correa L, Distler MO, Esser A, Fonvieille H, Friščić I, Fujii Y, Fujita M, Gogami T, Kanda H, Kaneta M, Kegel S, Kohl Y, Kusaka W, Margaryan A, Merkel H, Mihovilovič M, Müller U, Nagao S, Nakamura SN, Pochodzalla J, Lorente AS, Schlimme BS, Schoth M, Sfienti C, Širca S, Steinen M, Takahashi Y, Tang L, Thiel M, Tsukada K, Tyukin A, Weber A. Experimental investigations of the hypernucleus Λ4H. EPJ Web of Conferences 2016. [DOI: 10.1051/epjconf/201611307001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [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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8
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Zhang YW, Long E, Mihovilovič M, Jin G, Allada K, Anderson B, Annand JRM, Averett T, Ayerbe-Gayoso C, Boeglin W, Bradshaw P, Camsonne A, Canan M, Cates GD, Chen C, Chen JP, Chudakov E, De Leo R, Deng X, Deur A, Dutta C, El Fassi L, Flay D, Frullani S, Garibaldi F, Gao H, Gilad S, Gilman R, Glamazdin O, Golge S, Gomez J, Hansen O, Higinbotham DW, Holmstrom T, Huang J, Ibrahim H, de Jager CW, Jensen E, Jiang X, St John J, Jones M, Kang H, Katich J, Khanal HP, King P, Korsch W, LeRose J, Lindgren R, Lu HJ, Luo W, 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, Qiu X, Riordan S, Ron G, Saha A, Sawatzky B, Schiavilla R, Schoenrock B, Shabestari M, Shahinyan A, Širca S, Subedi R, Sulkosky V, Tobias WA, Tireman W, Urciuoli GM, Wang D, Wang K, Wang Y, Watson J, Wojtsekhowski B, Ye Z, Zhan X, Zhang Y, Zheng X, Zhao B, Zhu L. Measurement of the Target-Normal Single-Spin Asymmetry in Quasielastic Scattering from the Reaction (3)He(↑)(e,e'). Phys Rev Lett 2015; 115:172502. [PMID: 26551107 DOI: 10.1103/physrevlett.115.172502] [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: 02/05/2015] [Indexed: 06/05/2023]
Abstract
We report the first measurement of the target single-spin asymmetry, A(y), in quasielastic scattering from the inclusive reaction (3)He(↑)(e,e') on a (3)He gas target polarized normal to the lepton scattering plane. Assuming time-reversal invariance, this asymmetry is strictly zero for one-photon exchange. A nonzero A(y) can arise from the interference between the one- and two-photon exchange processes which is sensitive to the details of the substructure of the nucleon. An experiment recently completed at Jefferson Lab yielded asymmetries with high statistical precision at Q(2)=0.13, 0.46, and 0.97 GeV(2). These measurements demonstrate, for the first time, that the (3)He asymmetry is clearly nonzero and negative at the 4σ-9σ level. Using measured proton-to-(3)He cross-section ratios and the effective polarization approximation, neutron asymmetries of -(1-3)% were obtained. The neutron asymmetry at high Q(2) is related to moments of the generalized parton distributions (GPDs). Our measured neutron asymmetry at Q(2)=0.97 GeV(2) agrees well with a prediction based on two-photon exchange using a GPD model and thus provides a new, independent constraint on these distributions.
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Affiliation(s)
- Y-W Zhang
- Rutgers University, New Brunswick, New Jersey 08901, USA
- University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA
| | - E Long
- Kent State University, Kent, Ohio 44242, USA
| | | | - G Jin
- University of Virginia, Charlottesville, Virginia 22908, 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
| | - C Ayerbe-Gayoso
- 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 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, 00161 Roma, Italy
| | - F Garibaldi
- Istituto Nazionale Di Fisica Nucleare, INFN/Sanita, 00161 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
| | - 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 University, Farmville, Virginia 23909, USA
| | - J Huang
- Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545, 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
| | - J St John
- Longwood University, Farmville, Virginia 23909, USA
| | - M Jones
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - H Kang
- Seoul National University, Seoul 151-742, 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, Tunxi, Huangshan City, Anhui Province 245041, People's Republic of China
| | - W Luo
- Lanzhou University, Lanzhou, Gansu 730000, People's Republic of China
| | - 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 Qiu
- Lanzhou University, Lanzhou, Gansu 730000, People's Republic of China
| | - S Riordan
- University of Virginia, Charlottesville, Virginia 22908, USA
| | - G Ron
- Hebrew University of Jerusalem, Jerusalem 91904, Israel
| | - A Saha
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - B Sawatzky
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - R Schiavilla
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
- 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
| | - A Shahinyan
- Yerevan Physics Institute, Yerevan 375036, Armenia
| | - S Širca
- Jožef Stefan Institute, SI-1000 Ljubljana, Slovenia
- University of Ljubljana, SI-1000 Ljubljana, Slovenia
| | - 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, 00161 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
| | - 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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9
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Chirapatpimol K, Shabestari MH, Lindgren RA, Smith LC, Annand JRM, Higinbotham DW, Moffit B, Nelyubin V, Norum BE, Allada K, Aniol K, Ardashev K, Armstrong DS, Arndt RA, Benmokhtar F, Bernstein AM, Bertozzi W, Briscoe WJ, Bimbot L, Camsonne A, Chen JP, Choi S, Chudakov E, Cisbani E, Cusanno F, Dalton MM, Dutta C, Egiyan K, Fernàndez-Ramìrez C, Feuerbach R, Fissum KG, Frullani S, Garibaldi F, Gayou O, Gilman R, Gilad S, Goity J, Gomez J, Hahn B, Hamilton D, Hansen JO, Huang J, Igarashi R, Ireland D, de Jager CW, Jin X, Jiang X, Jinasundera T, Kellie J, Keppel CE, Kolb N, LeRose J, Liyanage N, Livingston K, McNulty D, Mercado L, Michaels R, Mihovilovič M, Qian S, Qian X, Mailyan S, Mamyan V, Marrone S, Monaghan P, Nanda S, Perdrisat CF, Piasetzky E, Protopopescu D, Punjabi V, Qiang Y, Rachek IA, Rakhman A, Riordan S, Ron G, Rosner G, Saha A, Sawatzky B, Shahinyan A, Širca S, Sparveris N, Subedi RR, Suleiman R, Strakovsky I, Sulkosky V, Moinelo J, Voskanyan H, Wang K, Wang Y, Watson J, Watts D, Wojtsekhowski B, Workman RL, Yao H, Zhan X, Zhang Y. Precision Measurement of the p(e,e^{'}p)π^{0} Reaction at Threshold. Phys Rev Lett 2015; 114:192503. [PMID: 26024167 DOI: 10.1103/physrevlett.114.192503] [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: 02/19/2015] [Indexed: 06/04/2023]
Abstract
New results are reported from a measurement of π^{0} electroproduction near threshold using the p(e,e^{'}p)π^{0} reaction. The experiment was designed to determine precisely the energy dependence of s- and p-wave electromagnetic multipoles as a stringent test of the predictions of chiral perturbation theory (ChPT). The data were taken with an electron beam energy of 1192 MeV using a two-spectrometer setup in Hall A at Jefferson Lab. For the first time, complete coverage of the ϕ_{π}^{*} and θ_{π}^{*} angles in the pπ^{0} center of mass was obtained for invariant energies above threshold from 0.5 up to 15 MeV. The 4-momentum transfer Q^{2} coverage ranges from 0.05 to 0.155 (GeV/c)^{2} in fine steps. A simple phenomenological analysis of our data shows strong disagreement with p-wave predictions from ChPT for Q^{2}>0.07 (GeV/c)^{2}, while the s-wave predictions are in reasonable agreement.
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Affiliation(s)
- K Chirapatpimol
- University of Virginia, Charlottesville, Virginia 22904, USA
- Chiang Mai University, Chiang Mai, Thailand 50200
| | - M H Shabestari
- University of Virginia, Charlottesville, Virginia 22904, USA
- Mississipi State University, Starkville, Mississippi 39762, USA
| | - R A Lindgren
- University of Virginia, Charlottesville, Virginia 22904, USA
| | - L C Smith
- University of Virginia, Charlottesville, Virginia 22904, USA
| | - J R M Annand
- University of Glasgow, Glasgow, G12 8QQ Scotland, United Kingdom
| | - D W Higinbotham
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - B Moffit
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - V Nelyubin
- University of Virginia, Charlottesville, Virginia 22904, USA
| | - B E Norum
- University of Virginia, Charlottesville, Virginia 22904, USA
| | - K Allada
- Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - K Aniol
- California State University, Los Angeles, Los Angeles, California 90032, USA
| | - K Ardashev
- University of Virginia, Charlottesville, Virginia 22904, USA
| | - D S Armstrong
- College of William and Mary, Williamsburg, Virginia 23187, USA
| | - R A Arndt
- The George Washington University, Washington, D.C. 20052, USA
| | - F Benmokhtar
- Duquesne University, Pittsburgh, Pennsylvania 15282, USA
| | - A M Bernstein
- Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - W Bertozzi
- Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - W J Briscoe
- The George Washington University, Washington, D.C. 20052, USA
| | - L Bimbot
- Institut de Physique Nucleaire, F-91406 Orsay Cedex, France
| | - A Camsonne
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, 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 Sanità, I-00161 Rome, Italy
| | - F Cusanno
- Istituto Nazionale di Fisica Nucleare, Sezione Sanità, I-00161 Rome, Italy
| | - M M Dalton
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - C Dutta
- University of Kentucky, Lexington, Kentucky 40506, USA
| | - K Egiyan
- Yerevan Physics Institute, Yerevan, 0036 Armenia
| | - C Fernàndez-Ramìrez
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - R Feuerbach
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - K G Fissum
- University of Lund, Box 118, SE-221 00 Lund, Sweden
| | - S Frullani
- Istituto Nazionale di Fisica Nucleare, Sezione Sanità, I-00161 Rome, Italy
| | - F Garibaldi
- Istituto Nazionale di Fisica Nucleare, Sezione Sanità, I-00161 Rome, Italy
| | - O Gayou
- Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - R Gilman
- Rutgers University, New Brunswick, New Jersey 08903, USA
| | - S Gilad
- Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - J Goity
- Hampton University, Hampton, Virginia 23668, USA
| | - J Gomez
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - B Hahn
- College of William and Mary, Williamsburg, Virginia 23187, USA
| | - D Hamilton
- University of Glasgow, Glasgow, G12 8QQ Scotland, United Kingdom
| | - J-O Hansen
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - J Huang
- Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - R Igarashi
- University of Saskatchewan, Saskatoon, Canada S7N 0W0
| | - D Ireland
- University of Glasgow, Glasgow, G12 8QQ Scotland, United Kingdom
| | - C W de Jager
- University of Virginia, Charlottesville, Virginia 22904, USA
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - X Jin
- University of Virginia, Charlottesville, Virginia 22904, USA
| | - X Jiang
- Rutgers University, New Brunswick, New Jersey 08903, USA
| | - T Jinasundera
- University of Virginia, Charlottesville, Virginia 22904, USA
| | - J Kellie
- University of Glasgow, Glasgow, G12 8QQ Scotland, United Kingdom
| | - C E Keppel
- Hampton University, Hampton, Virginia 23668, USA
| | - N Kolb
- University of Saskatchewan, Saskatoon, Canada S7N 0W0
| | - J LeRose
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - N Liyanage
- University of Virginia, Charlottesville, Virginia 22904, USA
| | - K Livingston
- University of Glasgow, Glasgow, G12 8QQ Scotland, United Kingdom
| | - D McNulty
- University of Massachusetts, Amherst, Massachusetts 01003, USA
- Idaho State University, Pocatello, Idaho, 83209, USA
| | - L Mercado
- University of Massachusetts, Amherst, Massachusetts 01003, USA
| | - R Michaels
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | | | - S Qian
- Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - X Qian
- Duke University, Durham, North Carolina 27708, USA
| | - S Mailyan
- Yerevan Physics Institute, Yerevan, 0036 Armenia
| | - V Mamyan
- Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA
| | - S Marrone
- Istituto Nazionale di Fisica Nucleare, Sezione Sanità, I-00161 Rome, Italy
| | - P Monaghan
- Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - S Nanda
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - C F Perdrisat
- College of William and Mary, Williamsburg, Virginia 23187, USA
| | | | - D Protopopescu
- University of Glasgow, Glasgow, G12 8QQ Scotland, United Kingdom
| | - V Punjabi
- Norfolk State University, Norfolk, Virginia 23504, USA
| | - Y Qiang
- Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - I A Rachek
- Budker Institute, 630090 Novosibirsk, Russia
| | - A Rakhman
- Syracuse University, Syracuse, New York 13244, USA
| | - S Riordan
- University of Massachusetts, Amherst, Massachusetts 01003, USA
- Stony Brook University, Stony Brook, New York 11794, USA
| | - G Ron
- Lawrence Berkeley National Lab, Berkeley, California 94720, USA
- Racah Institute of Physics, Hebrew University of Jerusalem, Jerusalem, Israel 91904
| | - G Rosner
- University of Glasgow, Glasgow, G12 8QQ Scotland, United Kingdom
| | - A Saha
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - B Sawatzky
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
- Temple University, Philadelphia, PA 19122 USA
| | - A Shahinyan
- Yerevan Physics Institute, Yerevan, 0036 Armenia
| | - S Širca
- Jožef Stefan Institute, SI-1000 Ljubljana, Slovenia
- University of Ljubljana, 1000 Ljubljana, Slovenia
| | - N Sparveris
- Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
- Temple University, Philadelphia, PA 19122 USA
| | - R R Subedi
- Kent State University, Kent, Ohio 44242, USA
| | - R Suleiman
- Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - I Strakovsky
- The George Washington University, Washington, D.C. 20052, USA
| | - V Sulkosky
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
- Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - J Moinelo
- Universidad Complutense de Madrid, Madrid 98040, Spain
| | - H Voskanyan
- Yerevan Physics Institute, Yerevan, 0036 Armenia
| | - K Wang
- University of Virginia, Charlottesville, Virginia 22904, USA
| | - Y Wang
- Rutgers University, New Brunswick, New Jersey 08903, USA
| | - J Watson
- Kent State University, Kent, Ohio 44242, USA
| | - D Watts
- University of Edinburgh, Edinburgh, EH8 9YL Scotland, United Kingdom
| | - B Wojtsekhowski
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - R L Workman
- The George Washington University, Washington, D.C. 20052, USA
| | - H Yao
- Temple University, Philadelphia, PA 19122 USA
| | - X Zhan
- Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - Y Zhang
- Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
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10
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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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11
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Posik M, Flay D, Parno DS, Allada K, Armstrong W, Averett T, Benmokhtar F, Bertozzi W, Camsonne A, Canan M, Cates GD, Chen C, Chen JP, Choi S, Chudakov E, Cusanno F, Dalton MM, Deconinck W, de Jager CW, Deng X, Deur A, Dutta C, El Fassi L, Franklin GB, Friend M, Gao H, Garibaldi F, Gilad S, Gilman R, Glamazdin O, Golge S, Gomez J, Guo L, Hansen O, Higinbotham DW, Holmstrom T, Huang J, Hyde C, Ibrahim HF, Jiang X, Jin G, Katich J, Kelleher A, Kolarkar A, Korsch W, Kumbartzki G, LeRose JJ, Lindgren R, Liyanage N, Long E, Lukhanin A, Mamyan V, McNulty D, Meziani ZE, Michaels R, Mihovilovič M, Moffit B, Muangma N, Nanda S, Narayan A, Nelyubin V, Norum B, Oh Y, Peng JC, Qian X, Qiang Y, Rakhman A, Riordan S, Saha A, Sawatzky B, Shabestari MH, Shahinyan A, Širca S, Solvignon P, Subedi R, Sulkosky V, Tobias WA, Troth W, Wang D, Wang Y, Wojtsekhowski B, Yan X, Yao H, Ye Y, Ye Z, Yuan L, Zhan X, Zhang Y, Zhang YW, Zhao B, Zheng X. Precision measurement of the neutron twist-3 matrix element d(2)(n): probing color forces. Phys Rev Lett 2014; 113:022002. [PMID: 25062166 DOI: 10.1103/physrevlett.113.022002] [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: 04/15/2014] [Indexed: 06/03/2023]
Abstract
Double-spin asymmetries and absolute cross sections were measured at large Bjorken x (0.25≤x≤0.90), in both the deep-inelastic and resonance regions, by scattering longitudinally polarized electrons at beam energies of 4.7 and 5.9 GeV from a transversely and longitudinally polarized (3)He target. In this dedicated experiment, the spin structure function g(2)((3)He) was determined with precision at large x, and the neutron twist-3 matrix element d(2)(n) was measured at ⟨Q(2)⟩ of 3.21 and 4.32 GeV(2)/c(2), with an absolute precision of about 10(-5). Our results are found to be in agreement with lattice QCD calculations and resolve the disagreement found with previous data at ⟨Q(2)⟩=5 GeV(2)/c(2). Combining d(2)(n) and a newly extracted twist-4 matrix element f(2)(n), the average neutron color electric and magnetic forces were extracted and found to be of opposite sign and about 30 MeV/fm in magnitude.
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Affiliation(s)
- M Posik
- Temple University, Philadelphia, Pennsylvania 19122, USA
| | - D Flay
- Temple University, Philadelphia, Pennsylvania 19122, USA
| | - D S Parno
- Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA and Center for Experimental Nuclear Physics and Astrophysics, University of Washington, Seattle, Washington 98195, USA
| | - K Allada
- University of Kentucky, Lexington, Kentucky 40506, USA
| | - W Armstrong
- Temple University, Philadelphia, Pennsylvania 19122, USA
| | - T Averett
- College of William and Mary, Williamsburg, Virginia 23187, USA
| | - F Benmokhtar
- Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA and Duquesne University, Pittsburgh, Pennsylvania 15282, USA
| | - W Bertozzi
- Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, 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 22904, USA
| | - C Chen
- Hampton University, Hampton, Virginia 23187, USA
| | - J-P Chen
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - S Choi
- Seoul National University, Seoul 151-742, South Korea
| | - E Chudakov
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - F Cusanno
- INFN, Sezione di Roma, I-00161 Rome, Italy and Istituto Superiore di Sanità, I-00161 Rome, Italy
| | - M M Dalton
- University of Virginia, Charlottesville, Virginia 22904, USA
| | - W Deconinck
- Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - C W de Jager
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - X Deng
- University of Virginia, Charlottesville, Virginia 22904, USA
| | - A Deur
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - C Dutta
- University of Kentucky, Lexington, Kentucky 40506, USA
| | - L El Fassi
- Old Dominion University, Norfolk, Virginia 23529, USA and Rutgers, The State University of New Jersey, Piscataway, New Jersey 08855, USA
| | - G B Franklin
- Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA
| | - M Friend
- Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA
| | - H Gao
- Duke University, Durham, North Carolina 27708, USA
| | | | - S Gilad
- Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - R Gilman
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA and Rutgers, The State University of New Jersey, Piscataway, New Jersey 08855, USA
| | - O Glamazdin
- Kharkov Institute of Physics and Technology, Kharkov 61108, Ukraine
| | - S Golge
- Old Dominion University, Norfolk, Virginia 23529, USA
| | - J Gomez
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - L Guo
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545, 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 University, Farmville, Virginia 23909, USA
| | - J Huang
- Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - C Hyde
- Old Dominion University, Norfolk, Virginia 23529, USA and Université Blaise Pascal/IN2P3, F-63177 Aubière, France
| | | | - X Jiang
- Rutgers, The State University of New Jersey, Piscataway, New Jersey 08855, USA and Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
| | - G Jin
- University of Virginia, Charlottesville, Virginia 22904, USA
| | - J Katich
- College of William and Mary, Williamsburg, Virginia 23187, USA
| | - A Kelleher
- College of William and Mary, Williamsburg, Virginia 23187, USA
| | - A Kolarkar
- University of Kentucky, Lexington, Kentucky 40506, USA
| | - W Korsch
- University of Kentucky, Lexington, Kentucky 40506, USA
| | - G Kumbartzki
- Rutgers, The State University of New Jersey, Piscataway, New Jersey 08855, USA
| | - J J LeRose
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - R Lindgren
- University of Virginia, Charlottesville, Virginia 22904, USA
| | - N Liyanage
- University of Virginia, Charlottesville, Virginia 22904, USA
| | - E Long
- Kent State University, Kent, Ohio 44242, USA
| | - A Lukhanin
- Temple University, Philadelphia, Pennsylvania 19122, USA
| | - V Mamyan
- Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA
| | - D McNulty
- University of Massachusetts, Amherst, Massachusetts 01003, 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 and Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - N Muangma
- Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - S Nanda
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - A Narayan
- Mississippi State University, Mississippi 39762, USA
| | - V Nelyubin
- University of Virginia, Charlottesville, Virginia 22904, USA
| | - B Norum
- University of Virginia, Charlottesville, Virginia 22904, USA
| | - Y Oh
- Seoul National University, Seoul 151-742, South Korea
| | - J C Peng
- University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA
| | - X Qian
- Duke University, Durham, North Carolina 27708, USA and Kellogg Radiation Laboratory, California Institute of Technology, Pasadena, California 91125, USA
| | - Y Qiang
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA and Duke University, Durham, North Carolina 27708, USA
| | - A Rakhman
- Syracuse University, Syracuse, New York 13244, USA
| | - S Riordan
- University of Virginia, Charlottesville, Virginia 22904, USA and University of Massachusetts, Amherst, Massachusetts 01003, USA
| | - A Saha
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - B Sawatzky
- Temple University, Philadelphia, Pennsylvania 19122, USA and Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - M H Shabestari
- University of Virginia, Charlottesville, Virginia 22904, USA
| | - A Shahinyan
- Yerevan Physics Institute, Yerevan 375036, Armenia
| | - S Širca
- Jožef Stefan Institute, SI-1000 Ljubljana, Slovenia and University of Ljubljana, SI-1000 Ljubljana, Slovenia
| | - P Solvignon
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA and Argonne National Lab, Argonne, Illinois 60439, USA
| | - R Subedi
- University of Virginia, Charlottesville, Virginia 22904, USA
| | - V Sulkosky
- Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA and Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - W A Tobias
- University of Virginia, Charlottesville, Virginia 22904, USA
| | - W Troth
- Longwood University, Farmville, Virginia 23909, USA
| | - D Wang
- University of Virginia, Charlottesville, Virginia 22904, USA
| | - Y Wang
- University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA
| | - B Wojtsekhowski
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - X Yan
- University of Science and Technology of China, Hefei 230026, People's Republic of China
| | - H Yao
- Temple University, Philadelphia, Pennsylvania 19122, USA and College of William and Mary, Williamsburg, Virginia 23187, USA
| | - Y Ye
- University of Science and Technology of China, Hefei 230026, People's Republic of China
| | - Z Ye
- Hampton University, Hampton, Virginia 23187, USA
| | - L Yuan
- Hampton University, Hampton, Virginia 23187, USA
| | - X Zhan
- Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - Y Zhang
- Lanzhou University, Lanzhou 730000, Gansu, People's Republic of China
| | - Y-W Zhang
- Rutgers, The State University of New Jersey, Piscataway, New Jersey 08855, USA and Lanzhou University, Lanzhou 730000, Gansu, People's Republic of China
| | - B Zhao
- College of William and Mary, Williamsburg, Virginia 23187, USA
| | - X Zheng
- University of Virginia, Charlottesville, Virginia 22904, USA
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Merkel H, Achenbach P, Ayerbe Gayoso C, Beranek T, Beričič J, Bernauer JC, Böhm R, Bosnar D, Correa L, Debenjak L, Denig A, Distler MO, Esser A, Fonvieille H, Friščić I, Gómez Rodríguez de la Paz M, Hoek M, Kegel S, Kohl Y, Middleton DG, Mihovilovič M, Müller U, Nungesser L, Pochodzalla J, Rohrbeck M, Ron G, Sánchez Majos S, Schlimme BS, Schoth M, Schulz F, Sfienti C, Sirca S, Thiel M, Tyukin A, Weber A, Weinriefer M. Search at the Mainz Microtron for light massive gauge bosons relevant for the muon g-2 anomaly. Phys Rev Lett 2014; 112:221802. [PMID: 24949757 DOI: 10.1103/physrevlett.112.221802] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/22/2014] [Indexed: 06/03/2023]
Abstract
A massive, but light, Abelian U(1) gauge boson is a well-motivated possible signature of physics beyond the standard model of particle physics. In this Letter, the search for the signal of such a U(1) gauge boson in electron-positron pair production at the spectrometer setup of the A1 Collaboration at the Mainz Microtron is described. Exclusion limits in the mass range of 40 MeV/c^{2} to 300 MeV/c^{2}, with a sensitivity in the squared mixing parameter of as little as ε^{2}=8×10^{-7} are presented. A large fraction of the parameter space has been excluded where the discrepancy of the measured anomalous magnetic moment of the muon with theory might be explained by an additional U(1) gauge boson.
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Affiliation(s)
- H Merkel
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, D-55099 Mainz, Germany
| | - P Achenbach
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, D-55099 Mainz, Germany
| | - C Ayerbe Gayoso
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, D-55099 Mainz, Germany
| | - T Beranek
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, D-55099 Mainz, Germany
| | - J Beričič
- Jožef Stefan Institute, SI-1000 Ljubljana, Slovenia
| | - J C Bernauer
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, D-55099 Mainz, Germany
| | - R Böhm
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, D-55099 Mainz, Germany
| | - D Bosnar
- Department of Physics, University of Zagreb, HR-10002 Zagreb, Croatia
| | - L Correa
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, D-55099 Mainz, Germany
| | - L Debenjak
- Jožef Stefan Institute, SI-1000 Ljubljana, Slovenia
| | - A Denig
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, D-55099 Mainz, Germany
| | - M O Distler
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, D-55099 Mainz, Germany
| | - A Esser
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, D-55099 Mainz, Germany
| | - H Fonvieille
- Clermont Université, Université Blaise Pascal, CNRS/IN2P3, LPC, BP 10448, F-63000 Clermont-Ferrand, France
| | - I Friščić
- Department of Physics, University of Zagreb, HR-10002 Zagreb, Croatia
| | | | - M Hoek
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, D-55099 Mainz, Germany
| | - S Kegel
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, D-55099 Mainz, Germany
| | - Y Kohl
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, D-55099 Mainz, Germany
| | - D G Middleton
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, D-55099 Mainz, Germany
| | - M Mihovilovič
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, D-55099 Mainz, Germany
| | - U Müller
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, D-55099 Mainz, Germany
| | - L Nungesser
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, D-55099 Mainz, Germany
| | - J Pochodzalla
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, D-55099 Mainz, Germany
| | - M Rohrbeck
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, D-55099 Mainz, Germany
| | - G Ron
- Racah Institute of Physics, Hebrew University of Jerusalem, Jerusalem 91904, Israel
| | - S Sánchez Majos
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, D-55099 Mainz, Germany
| | - B S Schlimme
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, D-55099 Mainz, Germany
| | - M Schoth
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, D-55099 Mainz, Germany
| | - F Schulz
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, D-55099 Mainz, Germany
| | - C Sfienti
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, D-55099 Mainz, Germany
| | - S Sirca
- Jožef Stefan Institute, SI-1000 Ljubljana, Slovenia and Department of Physics, University of Ljubljana, SI-1000 Ljubljana, Slovenia
| | - M Thiel
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, D-55099 Mainz, Germany
| | - A Tyukin
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, D-55099 Mainz, Germany
| | - A Weber
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, D-55099 Mainz, Germany
| | - M Weinriefer
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, D-55099 Mainz, Germany
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13
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Mihovilovič M, Merkel H, Weber A, Achenbach P, Ayerbe Gayoso C, Beranek T, Beričič J, Bernauer JC, Bosnar D, Böhm R, Correa L, Debenjak L, Denig A, Distler MO, Esser A, Fonvieille H, Friščić I, Gómez M, Kegel S, Kohl Y, Middleton DG, Müller U, Nungesser L, Pochodzalla J, Rohrbeck M, Sánchez Majos S, Schlimme BS, Schoth M, Schulz F, Sfienti C, Širca S, Štajner S, Thiel M, Weinriefer M. Initial state radiation experiment at MAMI. EPJ Web of Conferences 2014. [DOI: 10.1051/epjconf/20147200017] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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