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Abbene L, Buttacavoli A, Principato F, Gerardi G, Bettelli M, Zappettini A, Bazzi M, Bragadireanu M, Cargnelli M, Carminati M, Clozza A, Deda G, Del Grande R, De Paolis L, Fabbietti L, Fiorini C, Guaraldo C, Iliescu M, Iwasaki M, Khreptak A, Manti S, Marton J, Miliucci M, Moskal P, Napolitano F, Niedźwiecki S, Ohnishi H, Piscicchia K, Sada Y, Sgaramella F, Shi H, Silarski M, Sirghi DL, Sirghi F, Skurzok M, Spallone A, Toho K, Tüchler M, Doce OV, Yoshida C, Zmeskal J, Scordo A, Curceanu C. Potentialities of CdZnTe Quasi-Hemispherical Detectors for Hard X-ray Spectroscopy of Kaonic Atoms at the DAΦNE Collider. SENSORS (BASEL, SWITZERLAND) 2023; 23:7328. [PMID: 37687783 PMCID: PMC10490229 DOI: 10.3390/s23177328] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/07/2023] [Revised: 08/16/2023] [Accepted: 08/19/2023] [Indexed: 09/10/2023]
Abstract
Kaonic atom X-ray spectroscopy is a consolidated technique for investigations on the physics of strong kaon-nucleus/nucleon interaction. Several experiments have been conducted regarding the measurement of soft X-ray emission (<20 keV) from light kaonic atoms (hydrogen, deuterium, and helium). Currently, there have been new research activities within the framework of the SIDDHARTA-2 experiment and EXCALIBUR proposal focusing on performing precise and accurate measurements of hard X-rays (>20 keV) from intermediate kaonic atoms (carbon, aluminum, and sulfur). In this context, we investigated cadmium-zinc-telluride (CdZnTe or CZT) detectors, which have recently demonstrated high-resolution capabilities for hard X-ray and gamma-ray detection. A demonstrator prototype based on a new cadmium-zinc-telluride quasi-hemispherical detector and custom digital pulse processing electronics was developed. The detector covered a detection area of 1 cm2 with a single readout channel and interesting room-temperature performance with energy resolution of 4.4% (2.6 keV), 3% (3.7 keV), and 1.4% (9.3 keV) FWHM at 59.5, 122.1, and 662 keV, respectively. The results from X-ray measurements at the DAΦNE collider at the INFN National Laboratories of Frascati (Italy) are also presented with particular attention to the effects and rejection of electromagnetic and hadronic background.
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Affiliation(s)
- Leonardo Abbene
- Department of Physics and Chemistry (DiFC)—Emilio Segrè, University of Palermo, Viale delle Scienze, Edificio 18, 90128 Palermo, Italy
- Laboratori Nazionali di Frascati, INFN, Via E. Fermi 54, 00044 Frascati, Italy (C.C.)
| | - Antonino Buttacavoli
- Department of Physics and Chemistry (DiFC)—Emilio Segrè, University of Palermo, Viale delle Scienze, Edificio 18, 90128 Palermo, Italy
- Laboratori Nazionali di Frascati, INFN, Via E. Fermi 54, 00044 Frascati, Italy (C.C.)
| | - Fabio Principato
- Department of Physics and Chemistry (DiFC)—Emilio Segrè, University of Palermo, Viale delle Scienze, Edificio 18, 90128 Palermo, Italy
- Laboratori Nazionali di Frascati, INFN, Via E. Fermi 54, 00044 Frascati, Italy (C.C.)
| | - Gaetano Gerardi
- Department of Physics and Chemistry (DiFC)—Emilio Segrè, University of Palermo, Viale delle Scienze, Edificio 18, 90128 Palermo, Italy
| | - Manuele Bettelli
- Istituto Materiali per l’Elettronica e il Magnetismo, Consiglio Nazionale delle Ricerche (IMEM/CNR), Parco Area delle Scienze 37/A, 43100 Parma, Italy
| | - Andrea Zappettini
- Istituto Materiali per l’Elettronica e il Magnetismo, Consiglio Nazionale delle Ricerche (IMEM/CNR), Parco Area delle Scienze 37/A, 43100 Parma, Italy
| | - Massimiliano Bazzi
- Laboratori Nazionali di Frascati, INFN, Via E. Fermi 54, 00044 Frascati, Italy (C.C.)
| | - Mario Bragadireanu
- Horia Hulubei National Institute of Physics and Nuclear Engineering, Str. Atomistilor No. 407, 077125 Măgurele, Romania
| | | | - Marco Carminati
- Politecnico di Milano, Dipartimento di Elettronica, Informazione e Bioingegneria, 20133 Milano, Italy
- Istituto Nazionale di Fisica Nucleare (INFN), Sezione di Milano, 20133 Milano, Italy
| | - Alberto Clozza
- Laboratori Nazionali di Frascati, INFN, Via E. Fermi 54, 00044 Frascati, Italy (C.C.)
| | - Griseld Deda
- Politecnico di Milano, Dipartimento di Elettronica, Informazione e Bioingegneria, 20133 Milano, Italy
- Istituto Nazionale di Fisica Nucleare (INFN), Sezione di Milano, 20133 Milano, Italy
| | - Raffaele Del Grande
- Laboratori Nazionali di Frascati, INFN, Via E. Fermi 54, 00044 Frascati, Italy (C.C.)
- Physik Department E62, Technische Universität Münnchen, 85748 Garching, Germany
| | - Luca De Paolis
- Laboratori Nazionali di Frascati, INFN, Via E. Fermi 54, 00044 Frascati, Italy (C.C.)
| | - Laura Fabbietti
- Physik Department E62, Technische Universität Münnchen, 85748 Garching, Germany
| | - Carlo Fiorini
- Politecnico di Milano, Dipartimento di Elettronica, Informazione e Bioingegneria, 20133 Milano, Italy
- Istituto Nazionale di Fisica Nucleare (INFN), Sezione di Milano, 20133 Milano, Italy
| | - Carlo Guaraldo
- Laboratori Nazionali di Frascati, INFN, Via E. Fermi 54, 00044 Frascati, Italy (C.C.)
| | - Mihail Iliescu
- Laboratori Nazionali di Frascati, INFN, Via E. Fermi 54, 00044 Frascati, Italy (C.C.)
| | - Misahiko Iwasaki
- Institute of Physical and Chemical Research (RIKEN), Wako, Tokyo 351-0198, Japan
| | - Aleksander Khreptak
- Laboratori Nazionali di Frascati, INFN, Via E. Fermi 54, 00044 Frascati, Italy (C.C.)
- Faculty of Physics, Astronomy and Applied Computer Science, Jagiellonian University, 30-348 Krakow, Poland
| | - Simone Manti
- Laboratori Nazionali di Frascati, INFN, Via E. Fermi 54, 00044 Frascati, Italy (C.C.)
| | - Johann Marton
- Stefan-Meyer-Institut für Subatomare Physik, 1030 Vienna, Austria
| | - Marco Miliucci
- Laboratori Nazionali di Frascati, INFN, Via E. Fermi 54, 00044 Frascati, Italy (C.C.)
| | - Pawel Moskal
- Faculty of Physics, Astronomy and Applied Computer Science, Jagiellonian University, 30-348 Krakow, Poland
- Center for Theranostics, Jagiellonian University, Kopernika 40, 31-501 Krakow, Poland
| | - Fabrizio Napolitano
- Laboratori Nazionali di Frascati, INFN, Via E. Fermi 54, 00044 Frascati, Italy (C.C.)
| | - Szymon Niedźwiecki
- Faculty of Physics, Astronomy and Applied Computer Science, Jagiellonian University, 30-348 Krakow, Poland
- Center for Theranostics, Jagiellonian University, Kopernika 40, 31-501 Krakow, Poland
| | - Hiroaky Ohnishi
- Research Center for Electron Photon Science (ELPH), Tohoku University, Sendai 982-0826, Japan
| | - Kristian Piscicchia
- Laboratori Nazionali di Frascati, INFN, Via E. Fermi 54, 00044 Frascati, Italy (C.C.)
- Centro Ricerche Enrico Fermi—Museo Storico della Fisica e Centro Studi e Ricerche “Enrico Fermi”, 00184 Roma, Italy
| | - Yuta Sada
- Research Center for Electron Photon Science (ELPH), Tohoku University, Sendai 982-0826, Japan
| | - Francesco Sgaramella
- Laboratori Nazionali di Frascati, INFN, Via E. Fermi 54, 00044 Frascati, Italy (C.C.)
| | - Hexi Shi
- Stefan-Meyer-Institut für Subatomare Physik, 1030 Vienna, Austria
| | - Michalł Silarski
- Faculty of Physics, Astronomy and Applied Computer Science, Jagiellonian University, 30-348 Krakow, Poland
| | - Diana Laura Sirghi
- Laboratori Nazionali di Frascati, INFN, Via E. Fermi 54, 00044 Frascati, Italy (C.C.)
- Horia Hulubei National Institute of Physics and Nuclear Engineering, Str. Atomistilor No. 407, 077125 Măgurele, Romania
- Centro Ricerche Enrico Fermi—Museo Storico della Fisica e Centro Studi e Ricerche “Enrico Fermi”, 00184 Roma, Italy
| | - Florin Sirghi
- Laboratori Nazionali di Frascati, INFN, Via E. Fermi 54, 00044 Frascati, Italy (C.C.)
- Horia Hulubei National Institute of Physics and Nuclear Engineering, Str. Atomistilor No. 407, 077125 Măgurele, Romania
| | - Magdalena Skurzok
- Faculty of Physics, Astronomy and Applied Computer Science, Jagiellonian University, 30-348 Krakow, Poland
- Center for Theranostics, Jagiellonian University, Kopernika 40, 31-501 Krakow, Poland
| | - Antonio Spallone
- Laboratori Nazionali di Frascati, INFN, Via E. Fermi 54, 00044 Frascati, Italy (C.C.)
| | - Kairo Toho
- Research Center for Electron Photon Science (ELPH), Tohoku University, Sendai 982-0826, Japan
| | - Marlene Tüchler
- Stefan-Meyer-Institut für Subatomare Physik, 1030 Vienna, Austria
- Vienna Doctoral School in Physics, University of Vienna, 1090 Vienna, Austria
| | - Oton Vazquez Doce
- Laboratori Nazionali di Frascati, INFN, Via E. Fermi 54, 00044 Frascati, Italy (C.C.)
| | - Chihiro Yoshida
- Research Center for Electron Photon Science (ELPH), Tohoku University, Sendai 982-0826, Japan
| | - Johannes Zmeskal
- Stefan-Meyer-Institut für Subatomare Physik, 1030 Vienna, Austria
| | - Alessandro Scordo
- Laboratori Nazionali di Frascati, INFN, Via E. Fermi 54, 00044 Frascati, Italy (C.C.)
| | - Catalina Curceanu
- Laboratori Nazionali di Frascati, INFN, Via E. Fermi 54, 00044 Frascati, Italy (C.C.)
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De Paolis L, Bazzi M, Bosnar D, Bragadireanu M, Cargnelli M, Carminati M, Clozza A, Deda G, Del Grande R, Fabbietti L, Fiorini C, Friščić I, Guaraldo C, Iliescu M, Iwasaki M, Khreptak A, King P, Sandri PL, Manti S, Marton J, Miliucci M, Moskal P, Napolitano F, Niedźwiecki S, Ohnishi H, Piscicchia K, Sada Y, Scordo A, Sgaramella F, Shi H, Silarski M, Sirghi D, Sirghi F, Skurzok M, Spallone A, Toho K, Tüchler M, Doce OV, Yoshida C, Zmeskal J, Curceanu C. Trigger rejection factor in the first kaonic helium run with the complete SIDDHARTA-2 setup. EPJ WEB OF CONFERENCES 2022. [DOI: 10.1051/epjconf/202227000028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
The SIDDHARTA-2 experiment aims to perform the first measurement of the kaonic deuterium 2p → 1s x-ray transition energy. Such measurement, together with the measurement of kaonic hydrogen 2p → 1s x-ray energy transition performed by the SIDDHARTA experiment in 2011, allows the determination of kaon proton and kaon neutron scattering lengths and represents a fundamental input for the low energies QCD in the strangeness sector theory. The SIDDHARTA-2 experiment is presently installed at the DAΦNE electronpositron collider at the National Laboratories of Frascati, in Italy. In May 2022, the kaonic 4He x-ray transitions measurement was performed by the complete SIDDHARTA-2 setup, by using a gaseous target. The result of this measurement is presented in this paper, with a specific focus on the background rejection performed by the kaon trigger system.
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Abstract
Kaonic atoms measure the antikaon-nucleus interaction at almost zero relative energy, allowing one to determine basic low-energy quantum chromodynamics (QCD) quantities, namely, the antikaon-nucleon ( K ¯ N) scattering lengths. The latter are important for extracting the sigma terms which are built on the symmetry breaking part of the Hamiltonian, thereby providing a measure of chiral and SU(3) symmetries breaking. After discussing the sigma terms and their relations to the kaonic atoms, we describe the most precise measurement in the literature of kaonic hydrogen, performed at LNF-INFN by the SIDDHARTA experiment. Kaonic deuterium is still to be measured, and two experiments are planned. The first, SIDDHARTA-2 at LNF-INFN was installed on DA Φ NE in spring 2019 and will collect data in 2020. The second, E57 at J-PARC, will become operative in 2021.
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Abstract
This article presents the kaonic atom studies performed at the INFN National Laboratory of Frascati (Laboratori Nazionali di Frascati dell’INFN, LNF-INFN) since the opening of this field of research at the DA Φ NE collider in early 2000. Significant achievements have been obtained by the DA Φ NE Exotic Atom Research (DEAR) and Silicon Drift Detector for Hadronic Atom Research by Timing Applications (SIDDHARTA) experiments on kaonic hydrogen, which have required the development of novel X-ray detectors. The 2019 installation of the new SIDDHARTA-2 experiment to measure kaonic deuterium for the first time has been made possible by further technological advances in X-ray detection.
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Scordo A, Amirkhani A, Bazzi M, Bellotti G, Berucci C, Bosnar D, Bragadireanu A, Cargnelli M, Curceanu C, Dawood Butt A, Del Grande R, Fabbietti L, Fiorini C, Ghio F, Guaraldo C, Hayano R, Iliescu M, Iwasaki M, Levi Sandri P, Marton J, Miliucci M, Moskal P, Pietreanu D, Piscicchia K, Shi H, Silarski M, Sirghi D, Sirghi F, Skurzok M, Spallone A, Tatsuno H, Vazquez Doce O, Widmann E, Zmeskal J. The kaonic atoms research program at DAΦNE: from SIDDHARTA to SIDDHARTA-2. EPJ WEB OF CONFERENCES 2018. [DOI: 10.1051/epjconf/201818101004] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The interaction of antikaons with nucleons and nuclei in the low-energy regime represents an active research field in hadron physics with still many important open questions. The investigation of light kaonic atoms, in which one electron is replaced by a negatively charged kaon, is a unique tool to provide precise information on this interaction; the energy shift and the broadening of the low-lying states of such atoms, induced by the kaon-nucleus hadronic interaction, can be determined with high precision from the atomic X-ray spectroscopy, and this experimental method provides unique information to understand the low energy kaon-nucleus interaction at the production threshold. The lightest atomic systems, like the kaonic hydrogen and the kaonic deuterium deliver, in a model-independent way, the isospin-dependent kaon-nucleon scattering lengths. The most precise kaonic hydrogen measurement to-date, together with an exploratory measurement of kaonic deuterium, were carried out in 2009 by the SIDDHARTA collaboration at the DAΦNE electron-positron collider of LNF-INFN, combining the excellent quality kaon beam delivered by the collider with new experimental techniques, as fast and very precise X-ray detectors, like the Silicon Drift Detectors. The SIDDHARTA results triggered new theoretical work, which achieved major progress in the understanding of the low-energy strong interaction with strangeness reflected by the antikaon-nucleon scattering lengths calculated with the antikaon-proton amplitudes constrained by the SIDDHARTA data. The most important open question is the experimental determination of the hadronic energy shift and width of kaonic deuterium; presently, a major upgrade of the setup, SIDDHARTA-2, is being realized to reach this goal. In this paper, the results obtained in 2009 and the proposed SIDDHARTA-2 upgrades are presented.
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Kubis B, Meißner UG. Chiral dynamics with (non)strange quarks. EPJ WEB OF CONFERENCES 2017. [DOI: 10.1051/epjconf/201713403002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Shi H, Bazzi M, Beer G, Bellotti G, Berucci C, Bragadireanu A, Bosnar D, Cargnelli M, Curceanu C, Butt A, d’Uffizi A, Fiorini C, Ghio F, Guaraldo C, Hayano R, Iliescu M, Ishiwatari T, Iwasaki M, Levi Sandri P, Marton J, Okada S, Pietreanu D, Piscicchia K, Romero Vidal A, Sbardella E, Scordo A, Sirghi D, Sirghi F, Tatsuno H, Vazquez Doce O, Widmann E, Zmeskal J. Precision X-ray spectroscopy of kaonic atoms as a probe of low-energy kaon-nucleus interaction. EPJ WEB OF CONFERENCES 2016. [DOI: 10.1051/epjconf/201612604045] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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8
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Tatsuno H, Bazzi M, Beer G, Bellotti G, Berucci C, Bragadireanu A, Bosnar D, Cargnelli M, Curceanu C, Butt A, d’Uffizi A, Fiorini C, Ghio F, Guaraldo C, Hayano R, Iliescu M, Ishiwatari T, Iwasaki M, Levi Sandri P, Marton J, Okada S, Pietreanu D, Piscicchia K, Romero Vidal A, Sbardella E, Scordo A, Shi H, Sirghi D, Sirghi F, Vazquez Doce O, Widmann E, Zmeskal J. Future projects of light kaonic atom X-ray spectroscopy. EPJ WEB OF CONFERENCES 2016. [DOI: 10.1051/epjconf/201613001018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Marton J, Bazzi M, Beer G, Berucci C, Bosnar D, Bragadireanu A, Cargnelli M, Clozza A, Curceanu C, d’Uffizi A, Fiorini C, Ghio F, Guaraldo C, Hayano R, Iliescu M, Ishiwatari T, Iwasaki M, Sandri PL, Okada S, Pietreanu D, Piscicchia K, Ponta T, Quaglia R, Vidal AR, Sbardella E, Scordo A, Shi H, Sirghi D, Sirghi F, Tatsuno H, Doce OV, Widmann E, Zmeskal J. Strong interaction studies with kaonic atoms. EPJ WEB OF CONFERENCES 2016. [DOI: 10.1051/epjconf/201611303009] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Cieplý A, Mai M. Theoretical approaches to low energy K̅Ninteractions. EPJ WEB OF CONFERENCES 2016. [DOI: 10.1051/epjconf/201613002001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Ishiwatari T, Bazzi M, Beer G, Berucci C, Bombelli L, Bragadireanu A, Cargnelli M, Curceanu C, d’Uffizi A, Fiorini C, Ghio F, Guaraldo C, Hayano R, Iliescu M, Iwasaki M, Kienle P, Levi Sandri P, Longoni A, Marton J, Okada S, Pietreanu D, Ponta T, Quaglia R, Romero Vidal A, Sbardella E, Scordo A, Shi H, Sirghi D, Sirghi F, Tatsuno H, Tudorache A, Tudorache V, Vazquez Doce O, Wünschek B, Widmann E, Zmeskal J. New precision era of experiments on strong interaction with strangeness at DAFNE/LNF-INFN. EPJ WEB OF CONFERENCES 2014. [DOI: 10.1051/epjconf/20146605016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Marton J, Bazzi M, Beer G, Berucci C, Bragadireanu A, Cargnelli M, Curceanu C, d’Uffizi A, Fiorini C, Ghio F, Guaraldo C, Hayano R, Iliescu M, Ishiwatari T, Iwasaki M, Levi Sandri P, Okada S, Pietreanu D, Ponta T, Quaglia R, Romero Vidal A, Sbardella E, Scordo A, Shi H, Sirghi D, Sirghi F, Tatsuno H, Vazquez Doce O, Widmann E, Wünschek B, Zmeskal J. Kaonic atoms – studies of the strong interaction with strangeness. EPJ WEB OF CONFERENCES 2014. [DOI: 10.1051/epjconf/20148101017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Curceanu C, Bazzi M, Beer G, Berucci C, Bosnar D, Bragadireanu A, Cargnelli M, Clozza A, D’Uffizi A, Fabbietti L, Fiorini C, Ghio F, Guaraldo C, Hayano R, Iliescu M, Ishiwatari T, Iwasaki M, Levi Sandri P, Marton J, Okada S, Pietreanu D, Piscicchia K, Poli Lener M, Ponta T, Quaglia R, Romero Vidal A, Sbardella E, Scordo A, Shi H, Sirghi D, Sirghi F, Tatsuno H, Tucaković I, Vazquez Doce O, Widmann E, Zmeskal J. Unveiling the strangeness secrets: low-energy kaon-nucleon/nuclei interactions studies at DAΦNE. EPJ WEB OF CONFERENCES 2014. [DOI: 10.1051/epjconf/20146609004] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Marton J, Bartalucci S, Bertolucci S, Berucci C, Bragadireanu M, Cargnelli M, Curceanu C, Matteo SD, Egger JP, Guaraldo C, Iliescu M, Ishiwatari T, Laubenstein M, Milotti E, Pietreanu D, Piscicchia K, Ponta T, Vidal AR, Scordo A, Sirghi DL, Sirghi F, Sperandio L, Doce OV, Widmann E, Zmeskal J. Testing the Pauli Exclusion Principle for Electrons. ACTA ACUST UNITED AC 2013. [DOI: 10.1088/1742-6596/447/1/012070] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Abstract
Hydrogen has a central role in the story of the universe itself and also in the story of our efforts to understand it. This paper retells the story of the part played by hydrogen and its stable isotope deuterium in the primordial synthesis of the elements, then goes on to describe how the spectrum of atomic hydrogen led to insights into the laws governing matter at the most fundamental level, from the quantum mechanics of Schrödinger and Heisenberg, through quantum electrodynamics, to the most recent work investigating the underlying structure of the proton itself. Atomic hydrogen is unique among the elements in that the concept of isotopy--atoms having the same nuclear charge but different masses--is stretched to its limit in the isotopes of hydrogen, ranging from the well-known isotopes deuterium and tritium to exotic species such as muonium, muonic helium, and positronium. These atoms, or atom-like objects, have much to tell us about fundamental aspects of the universe. In recent years the idea of utilizing hydrogen either as an energy source (through nuclear fusion) or as an energy storage medium (bound in hydrides or other materials) has attracted much attention as a possible avenue to a post-oil energy future. Some of the more interesting recent developments are described here. Dedicated to the memory of Brian C. Webster (1939-2008).
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Affiliation(s)
- Roderick M Macrae
- School of Mathematics and Sciences, Marian University, Indianapolis, Indiana 46222, USA.
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Shevchenko NV, Gal A, Mares J. Faddeev calculation of a K- pp quasibound state. PHYSICAL REVIEW LETTERS 2007; 98:082301. [PMID: 17359090 DOI: 10.1103/physrevlett.98.082301] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/11/2006] [Indexed: 05/14/2023]
Abstract
We report on the first genuinely three-body K[over]NN- piSigmaN coupled-channel Faddeev calculation in search for quasibound states in the K- pp system. The main absorptivity in the K- p subsystem is accounted for by fitting to K- p data near threshold. Our calculation yields one such quasibound state, with I=1/2, J{pi}=0-, bound in the range B approximately 55-70 MeV, with a width of Gamma approximately 90-110 MeV. These results differ substantially from previous estimates, and are at odds with the K- pp-->Lambda p signal observed by the FINUDA collaboration.
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Borasoy B, Nissler R, Weise W. Comment on "surprises in threshold antikaon-nucleon physics". PHYSICAL REVIEW LETTERS 2006; 96:199201; author reply 199202. [PMID: 16803147 DOI: 10.1103/physrevlett.96.199201] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/20/2005] [Indexed: 05/10/2023]
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Oller JA, Prades J, Verbeni M. Surprises in threshold antikaon-nucleon physics. PHYSICAL REVIEW LETTERS 2005; 95:172502. [PMID: 16383823 DOI: 10.1103/physrevlett.95.172502] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/06/2005] [Indexed: 05/05/2023]
Abstract
Low energy KN interactions are studied within unitary chiral perturbation theory at next-to-leading order with ten coupled channels. We pay special attention to the recent precise determination of the strong shift and width of the kaonic hydrogen 1s state by the DEAR Collaboration that has challenged our theoretical understanding of this sector of strong interactions. We typically find two classes of solutions, both of them reproducing previous data, that either can or cannot accommodate the DEAR measurements. The former class has not been previously discussed.
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Affiliation(s)
- José A Oller
- Departamento de Física, Universidad de Murcia, E-30071 Murcia, Spain
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