Exploring the Structure of the Bound Proton with Deeply Virtual Compton Scattering.

Autor: Hattawy M; Argonne National Laboratory, Argonne, Illinois 60439, USA.; Institut de Physique Nucléaire, IN2P3-CNRS, Université Paris-Sud, Université Paris-Saclay, F-91406 Orsay, France.; Old Dominion University, Norfolk, Virginia 23529, USA., Baltzell NA; Argonne National Laboratory, Argonne, Illinois 60439, USA.; Old Dominion University, Norfolk, Virginia 23529, USA.; Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA., Dupré R; Argonne National Laboratory, Argonne, Illinois 60439, USA.; Institut de Physique Nucléaire, IN2P3-CNRS, Université Paris-Sud, Université Paris-Saclay, F-91406 Orsay, France., Bültmann S; Old Dominion University, Norfolk, Virginia 23529, USA., De Vita R; INFN, Sezione di Genova, 16146 Genova, Italy., El Alaoui A; Argonne National Laboratory, Argonne, Illinois 60439, USA.; Universidad Técnica Federico Santa María, Casilla 110-V Valparaíso, Chile., El Fassi L; Argonne National Laboratory, Argonne, Illinois 60439, USA.; Mississippi State University, Mississippi State, Mississippi 39762-5167, USA., Egiyan H; Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA., Girod FX; Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA., Guidal M; Institut de Physique Nucléaire, IN2P3-CNRS, Université Paris-Sud, Université Paris-Saclay, F-91406 Orsay, France., Hafidi K; Argonne National Laboratory, Argonne, Illinois 60439, USA., Jenkins D; Virginia Tech, Blacksburg, Virginia 24061-0435, USA., Liuti S; University of Virginia, Charlottesville, Virginia 22901, USA., Perrin Y; LPSC, Université Grenoble-Alpes, CNRS/IN2P3, 38026 Grenoble, France., Stepanyan S; Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA., Torayev B; Old Dominion University, Norfolk, Virginia 23529, USA., Voutier E; Institut de Physique Nucléaire, IN2P3-CNRS, Université Paris-Sud, Université Paris-Saclay, F-91406 Orsay, France.; LPSC, Université Grenoble-Alpes, CNRS/IN2P3, 38026 Grenoble, France., Adhikari S; Florida International University, Miami, Florida 33199, USA., Angelini G; The George Washington University, Washington, DC 20052, USA., Ayerbe Gayoso C; College of William and Mary, Williamsburg, Virginia 23187-8795, USA., Barion L; INFN, Sezione di Ferrara, 44100 Ferrara, Italy., Battaglieri M; INFN, Sezione di Genova, 16146 Genova, Italy., Bedlinskiy I; Institute of Theoretical and Experimental Physics, Moscow, 117259, Russia., Biselli AS; Fairfield University, Fairfield Connecticut 06824, USA., Bossù F; IRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France., Brooks W; Universidad Técnica Federico Santa María, Casilla 110-V Valparaíso, Chile., Cao F; University of Connecticut, Storrs, Connecticut 06269, USA., Carman DS; Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA., Celentano A; INFN, Sezione di Genova, 16146 Genova, Italy., Chatagnon P; Institut de Physique Nucléaire, IN2P3-CNRS, Université Paris-Sud, Université Paris-Saclay, F-91406 Orsay, France., Chetry T; Ohio University, Athens, Ohio 45701, USA., Ciullo G; Universita' di Ferrara, 44121 Ferrara, Italy.; INFN, Sezione di Ferrara, 44100 Ferrara, Italy., Clark L; University of Glasgow, Glasgow G12 8QQ, United Kingdom., Cole PL; Idaho State University, Pocatello, Idaho 83209, USA.; Lamar University, 4400 MLK Boulevard, P.O. Box 10009, Beaumont, Texas 77710, USA., Contalbrigo M; INFN, Sezione di Ferrara, 44100 Ferrara, Italy., Crede V; Florida State University, Tallahassee, Florida 32306, USA., D'Angelo A; INFN, Sezione di Roma Tor Vergata, 00133 Rome, Italy.; Universita' di Roma Tor Vergata, 00133 Rome, Italy., Dashyan N; Yerevan Physics Institute, 375036 Yerevan, Armenia., De Sanctis E; INFN, Laboratori Nazionali di Frascati, 00044 Frascati, Italy., Defurne M; IRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France., Deur A; Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA., Diehl S; University of Connecticut, Storrs, Connecticut 06269, USA., Djalali C; Ohio University, Athens, Ohio 45701, USA.; University of South Carolina, Columbia, South Carolina 29208, USA., Ehrhart M; Institut de Physique Nucléaire, IN2P3-CNRS, Université Paris-Sud, Université Paris-Saclay, F-91406 Orsay, France., Eugenio P; Florida State University, Tallahassee, Florida 32306, USA., Fegan S; University of Glasgow, Glasgow G12 8QQ, United Kingdom., Filippi A; INFN, Sezione di Torino, 10125 Torino, Italy., Forest TA; Idaho State University, Pocatello, Idaho 83209, USA., Fradi A; Institut de Physique Nucléaire, IN2P3-CNRS, Université Paris-Sud, Université Paris-Saclay, F-91406 Orsay, France., Garçon M; IRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France., Gavalian G; Old Dominion University, Norfolk, Virginia 23529, USA.; Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA., Gevorgyan N; Yerevan Physics Institute, 375036 Yerevan, Armenia., Gilfoyle GP; University of Richmond, Richmond, Virginia 23173, USA., Giovanetti KL; James Madison University, Harrisonburg, Virginia 22807, USA., Golovatch E; Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, 119234 Moscow, Russia., Gothe RW; University of South Carolina, Columbia, South Carolina 29208, USA., Griffioen KA; College of William and Mary, Williamsburg, Virginia 23187-8795, USA., Harrison N; Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA., Hauenstein F; Old Dominion University, Norfolk, Virginia 23529, USA., Hayward TB; College of William and Mary, Williamsburg, Virginia 23187-8795, USA., Heddle D; Christopher Newport University, Newport News, Virginia 23606, USA.; Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA., Hicks K; Ohio University, Athens, Ohio 45701, USA., Holtrop M; University of New Hampshire, Durham, New Hampshire 03824-3568, USA., Ilieva Y; University of South Carolina, Columbia, South Carolina 29208, USA., Ireland DG; University of Glasgow, Glasgow G12 8QQ, United Kingdom., Isupov EL; Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, 119234 Moscow, Russia., Jo HS; Kyungpook National University, Daegu 41566, Republic of Korea., Johnston S; Argonne National Laboratory, Argonne, Illinois 60439, USA., Keller D; Ohio University, Athens, Ohio 45701, USA.; University of Virginia, Charlottesville, Virginia 22901, USA., Khachatryan G; Yerevan Physics Institute, 375036 Yerevan, Armenia., Khachatryan M; Old Dominion University, Norfolk, Virginia 23529, USA., Khanal A; Florida International University, Miami, Florida 33199, USA., Khandaker M; Norfolk State University, Norfolk, Virginia 23504, USA., Kim CW; The George Washington University, Washington, DC 20052, USA., Kim W; Kyungpook National University, Daegu 41566, Republic of Korea., Klein FJ; Catholic University of America, Washington, DC 20064, USA., Kubarovsky V; Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA., Kuhn SE; Old Dominion University, Norfolk, Virginia 23529, USA., Lanza L; INFN, Sezione di Roma Tor Vergata, 00133 Rome, Italy., L Kabir M; Mississippi State University, Mississippi State, Mississippi 39762-5167, USA., Lenisa P; INFN, Sezione di Ferrara, 44100 Ferrara, Italy., Livingston K; University of Glasgow, Glasgow G12 8QQ, United Kingdom., MacGregor IJD; University of Glasgow, Glasgow G12 8QQ, United Kingdom., Marchand D; Institut de Physique Nucléaire, IN2P3-CNRS, Université Paris-Sud, Université Paris-Saclay, F-91406 Orsay, France., Markov N; University of Connecticut, Storrs, Connecticut 06269, USA., Mayer M; Old Dominion University, Norfolk, Virginia 23529, USA., McKinnon B; University of Glasgow, Glasgow G12 8QQ, United Kingdom., Meziani ZE; Temple University, Philadelphia, Pennsylvania 19122, USA., Mineeva T; Universidad Técnica Federico Santa María, Casilla 110-V Valparaíso, Chile., Mirazita M; INFN, Laboratori Nazionali di Frascati, 00044 Frascati, Italy., Montgomery RA; University of Glasgow, Glasgow G12 8QQ, United Kingdom., Munoz Camacho C; Institut de Physique Nucléaire, IN2P3-CNRS, Université Paris-Sud, Université Paris-Saclay, F-91406 Orsay, France., Nadel-Turonski P; Catholic University of America, Washington, DC 20064, USA.; Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA., Niccolai S; Institut de Physique Nucléaire, IN2P3-CNRS, Université Paris-Sud, Université Paris-Saclay, F-91406 Orsay, France., Ostrovidov AI; Florida State University, Tallahassee, Florida 32306, USA., Pappalardo LL; INFN, Sezione di Ferrara, 44100 Ferrara, Italy., Paremuzyan R; University of New Hampshire, Durham, New Hampshire 03824-3568, USA.; Yerevan Physics Institute, 375036 Yerevan, Armenia., Pasyuk E; Arizona State University, Tempe, Arizona 85287-1504, USA.; Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA., Pogorelko O; Institute of Theoretical and Experimental Physics, Moscow, 117259, Russia., Poudel J; Old Dominion University, Norfolk, Virginia 23529, USA., Prok Y; Old Dominion University, Norfolk, Virginia 23529, USA.; University of Virginia, Charlottesville, Virginia 22901, USA., Protopopescu D; University of Glasgow, Glasgow G12 8QQ, United Kingdom., Ripani M; INFN, Sezione di Genova, 16146 Genova, Italy., Riser D; University of Connecticut, Storrs, Connecticut 06269, USA., Rizzo A; INFN, Sezione di Roma Tor Vergata, 00133 Rome, Italy.; Universita' di Roma Tor Vergata, 00133 Rome, Italy., Rosner G; University of Glasgow, Glasgow G12 8QQ, United Kingdom., Rossi P; INFN, Laboratori Nazionali di Frascati, 00044 Frascati, Italy.; Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA., Sabatié F; IRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France., Salgado C; Norfolk State University, Norfolk, Virginia 23504, USA., Schumacher RA; Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA., Sharabian YG; Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA., Skorodumina I; Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, 119234 Moscow, Russia.; University of South Carolina, Columbia, South Carolina 29208, USA., Sokhan D; University of Glasgow, Glasgow G12 8QQ, United Kingdom., Soto O; Universidad Técnica Federico Santa María, Casilla 110-V Valparaíso, Chile., Sparveris N; Temple University, Philadelphia, Pennsylvania 19122, USA., Strauch S; University of South Carolina, Columbia, South Carolina 29208, USA., Taiuti M; Universitá di Genova, 16146 Genova, Italy., Tan JA; Kyungpook National University, Daegu 41566, Republic of Korea., Tyler N; University of South Carolina, Columbia, South Carolina 29208, USA., Ungaro M; University of Connecticut, Storrs, Connecticut 06269, USA.; Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA., Voskanyan H; Yerevan Physics Institute, 375036 Yerevan, Armenia., Wang R; Institut de Physique Nucléaire, IN2P3-CNRS, Université Paris-Sud, Université Paris-Saclay, F-91406 Orsay, France., Watts DP; University of York, York YO10 5DD, United Kingdom., Wei X; Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA., Weinstein LB; Old Dominion University, Norfolk, Virginia 23529, USA., Wood MH; Canisius College, Buffalo, New York, USA., Zachariou N; University of York, York YO10 5DD, United Kingdom., Zhang J; Old Dominion University, Norfolk, Virginia 23529, USA.; University of Virginia, Charlottesville, Virginia 22901, USA., Zhao ZW; Duke University, Durham, North Carolina 27708-0305, USA.; University of South Carolina, Columbia, South Carolina 29208, USA.
Jazyk: angličtina
Zdroj: Physical review letters [Phys Rev Lett] 2019 Jul 19; Vol. 123 (3), pp. 032502.
DOI: 10.1103/PhysRevLett.123.032502
Abstrakt: In the past two decades, deeply virtual Compton scattering of electrons has been successfully used to advance our knowledge of the partonic structure of the free proton and investigate correlations between the transverse position and the longitudinal momentum of quarks inside the nucleon. Meanwhile, the structure of bound nucleons in nuclei has been studied in inclusive deep-inelastic lepton scattering experiments off nuclear targets, showing a significant difference in longitudinal momentum distribution of quarks inside the bound nucleon, known as the EMC effect. In this Letter, we report the first beam spin asymmetry (BSA) measurement of exclusive deeply virtual Compton scattering off a proton bound in ^{4}He. The data used here were accumulated using a 6 GeV longitudinally polarized electron beam incident on a pressurized ^{4}He gaseous target placed within the CLAS spectrometer in Hall-B at the Thomas Jefferson National Accelerator Facility. The azimuthal angle (ϕ) dependence of the BSA was studied in a wide range of virtual photon and scattered proton kinematics. The Q^{2}, x_{B}, and t dependencies of the BSA on the bound proton are compared with those on the free proton. In the whole kinematical region of our measurements, the BSA on the bound proton is smaller by 20% to 40%, indicating possible medium modification of its partonic structure.
Databáze: MEDLINE