Longitudinal target-spin asymmetries for deeply virtual compton scattering.

Autor: Seder E; University of Connecticut, Storrs, Connecticut 06269, USA and CEA, Centre de Saclay, Irfu/Service de Physique Nucléaire, 91191 Gif-sur-Yvette, France., Biselli A; Fairfield University, Fairfield, Connecticut 06824, USA., Pisano S; INFN, Laboratori Nazionali di Frascati, 00044 Frascati, Italy and Institut de Physique Nucléaire Orsay, 91406 Orsay, France., Niccolai S; Institut de Physique Nucléaire Orsay, 91406 Orsay, France., Smith GD; University of Glasgow, Glasgow G12 8QQ, United Kingdom and Edinburgh University, Edinburgh EH9 3JZ, United Kingdom., Joo K; University of Connecticut, Storrs, Connecticut 06269, USA., Adhikari K; Old Dominion University, Norfolk, Virginia 23529, USA., Amaryan MJ; Old Dominion University, Norfolk, Virginia 23529, USA., Anderson MD; University of Glasgow, Glasgow G12 8QQ, United Kingdom., Anefalos Pereira S; INFN, Laboratori Nazionali di Frascati, 00044 Frascati, Italy., Avakian H; Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA., Battaglieri M; INFN, Sezione di Genova, 16146 Genova, Italy., Bedlinskiy I; Institute of Theoretical and Experimental Physics, Moscow 117259, Russia., Bono J; Florida International University, Miami, Florida 33199, USA., Boiarinov S; Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA., Bosted P; Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA and College of William and Mary, Williamsburg, Virginia 23187-8795, USA., Briscoe W; The George Washington University, Washington, D.C. 20052, USA., Brock J; Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA., Brooks WK; Universidad Técnica Federico Santa María, Casilla 110-V Valparaíso, Chile., Bültmann S; Old Dominion University, Norfolk, Virginia 23529, USA., Burkert VD; Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA., Carman DS; Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA., Carlin C; Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA., Celentano A; INFN, Sezione di Genova, 16146 Genova, Italy., Chandavar S; Ohio University, Athens, Ohio 45701, USA., Charles G; Institut de Physique Nucléaire Orsay, 91406 Orsay, France., Colaneri L; INFN, Sezione di Roma Tor Vergata, 00133 Roma, Italy., Cole PL; Idaho State University, Pocatello, Idaho 83209, USA., Contalbrigo M; INFN, Sezione di Ferrara, 44100 Ferrara, Italy., Crabb D; University of Virginia, Charlottesville, Virginia 22901, USA., Crede V; University of Virginia, Charlottesville, Virginia 22901, USA., D'Angelo A; INFN, Sezione di Roma Tor Vergata, 00133 Roma, Italy and Università di Roma Tor Vergata, 00133 Roma, Italy., Dashyan N; Yerevan Physics Institute, 375036 Yerevan, Armenia., De Vita R; INFN, Sezione di Genova, 16146 Genova, Italy., De Sanctis E; INFN, Laboratori Nazionali di Frascati, 00044 Frascati, Italy., Deur A; Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA., Djalali C; University of South Carolina, Columbia, South Carolina 29208, USA., Doughty D; Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA and Christopher Newport University, Newport News, Virginia 23606, USA., Dupre R; Institut de Physique Nucléaire Orsay, 91406 Orsay, France and Argonne National Laboratory, Argonne, Illinois 60439, USA., El Fassi L; Old Dominion University, Norfolk, Virginia 23529, USA., Elouadrhiri L; Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA., Eugenio P; Florida State University, Tallahassee, Florida 32306, USA., Fedotov G; University of South Carolina, Columbia, South Carolina 29208, USA and Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, 119234 Moscow, Russia., Fegan S; University of Glasgow, Glasgow G12 8QQ, United Kingdom and INFN, Sezione di Genova, 16146 Genova, Italy., Filippi A; INFN, Sezione di Torino, Torino, Italy., Fleming JA; Edinburgh University, Edinburgh EH9 3JZ, United Kingdom., Fradi A; Institut de Physique Nucléaire Orsay, 91406 Orsay, France., Garillon B; Institut de Physique Nucléaire Orsay, 91406 Orsay, France., Garçon M; CEA, Centre de Saclay, Irfu/Service de Physique Nucléaire, 91191 Gif-sur-Yvette, France., Gevorgyan N; Yerevan Physics Institute, 375036 Yerevan, Armenia., Ghandilyan Y; Yerevan Physics Institute, 375036 Yerevan, Armenia., Giovanetti KL; James Madison University, Harrisonburg, Virginia 22807, USA., Girod FX; CEA, Centre de Saclay, Irfu/Service de Physique Nucléaire, 91191 Gif-sur-Yvette, France and Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA., Goetz JT; Ohio University, Athens, Ohio 45701, USA., Gohn W; University of Connecticut, Storrs, Connecticut 06269, USA., Gothe RW; University of South Carolina, Columbia, South Carolina 29208, USA., Griffioen KA; College of William and Mary, Williamsburg, Virginia 23187-8795, USA., Guegan B; Institut de Physique Nucléaire Orsay, 91406 Orsay, France., Guidal M; Institut de Physique Nucléaire Orsay, 91406 Orsay, France., Guo L; Florida International University, Miami, Florida 33199, USA., Hafidi K; Argonne National Laboratory, Argonne, Illinois 60439, USA., Hakobyan H; Universidad Técnica Federico Santa María, Casilla 110-V Valparaíso, Chile and Yerevan Physics Institute, 375036 Yerevan, Armenia., Hanretty C; University of Virginia, Charlottesville, Virginia 22901, USA., Harrison N; University of Connecticut, Storrs, Connecticut 06269, USA., Hattawy M; Institut de Physique Nucléaire Orsay, 91406 Orsay, France., Hirlinger Saylor N; Rensselaer Polytechnic Institute, Troy, New York 12180-3590, USA., Holtrop M; University of New Hampshire, Durham, New Hampshire 03824-3568, USA., Hughes SM; Edinburgh University, Edinburgh EH9 3JZ, United Kingdom., Ilieva Y; University of South Carolina, Columbia, South Carolina 29208, USA., Ireland DG; University of Glasgow, Glasgow G12 8QQ, United Kingdom., Ishkhanov BS; Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, 119234 Moscow, Russia., Isupov EL; Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, 119234 Moscow, Russia., Jo HS; Institut de Physique Nucléaire Orsay, 91406 Orsay, France., Joosten S; Temple University, Philadelphia, Pennsylvania 19122, USA., Keith CD; Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA., Keller D; Ohio University, Athens, Ohio 45701, USA and University of Virginia, Charlottesville, Virginia 22901, USA., Khachatryan G; Yerevan Physics Institute, 375036 Yerevan, Armenia., Khandaker M; Idaho State University, Pocatello, Idaho 83209, USA and Norfolk State University, Norfolk, Virginia 23504, USA., Kim A; Kyungpook National University, Daegu 702-701, Republic of Korea., Kim W; Kyungpook National University, Daegu 702-701, Republic of Korea., Klein A; Old Dominion University, Norfolk, Virginia 23529, USA., Klein FJ; Catholic University of America, Washington, D.C. 20064, USA., Koirala S; Old Dominion University, Norfolk, Virginia 23529, USA., Kubarovsky V; Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA., Kuhn SE; Old Dominion University, Norfolk, Virginia 23529, USA., Lenisa P; INFN, Sezione di Ferrara, 44100 Ferrara, Italy., Livingston K; University of Glasgow, Glasgow G12 8QQ, United Kingdom., Lu HY; University of South Carolina, Columbia, South Carolina 29208, USA., MacGregor IJ; University of Glasgow, Glasgow G12 8QQ, United Kingdom., 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., Meekins DG; Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA., Mineeva T; University of Connecticut, Storrs, Connecticut 06269, USA., Mirazita M; INFN, Laboratori Nazionali di Frascati, 00044 Frascati, Italy., Mokeev V; Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA and Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, 119234 Moscow, Russia., Montgomery R; INFN, Laboratori Nazionali di Frascati, 00044 Frascati, Italy., Moody CI; Argonne National Laboratory, Argonne, Illinois 60439, USA., Moutarde H; CEA, Centre de Saclay, Irfu/Service de Physique Nucléaire, 91191 Gif-sur-Yvette, France., Movsisyan A; INFN, Sezione di Ferrara, 44100 Ferrara, Italy., Munoz Camacho C; Institut de Physique Nucléaire Orsay, 91406 Orsay, France., Nadel-Turonski P; Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA and Catholic University of America, Washington, D.C. 20064, USA., Niculescu I; James Madison University, Harrisonburg, Virginia 22807, USA., Osipenko M; INFN, Sezione di Genova, 16146 Genova, Italy., Ostrovidov AI; Florida State University, Tallahassee, Florida 32306, USA., Paolone M; Temple University, Philadelphia, Pennsylvania 19122, USA., Pappalardo LL; INFN, Sezione di Ferrara, 44100 Ferrara, Italy., Park K; Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA and University of South Carolina, Columbia, South Carolina 29208, USA., Park S; Florida State University, Tallahassee, Florida 32306, USA., Pasyuk E; Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA and Arizona State University, Tempe, Arizona 85287-1504, USA., Peng P; University of Virginia, Charlottesville, Virginia 22901, USA., Phelps W; Florida International University, Miami, Florida 33199, USA., Pogorelko O; Institute of Theoretical and Experimental Physics, Moscow 117259, Russia., Price JW; California State University, Dominguez Hills, Carson, California 90747, USA., Prok Y; Old Dominion University, Norfolk, Virginia 23529, USA., Protopopescu D; University of Glasgow, Glasgow G12 8QQ, United Kingdom., Puckett AJ; University of Connecticut, Storrs, Connecticut 06269, USA., Ripani M; INFN, Sezione di Genova, 16146 Genova, Italy., Rizzo A; INFN, Sezione di Roma Tor Vergata, 00133 Roma, Italy., Rosner G; University of Glasgow, Glasgow G12 8QQ, United Kingdom., Rossi P; INFN, Laboratori Nazionali di Frascati, 00044 Frascati, Italy and Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA., Roy P; Florida State University, Tallahassee, Florida 32306, USA., Sabatié F; CEA, Centre de Saclay, Irfu/Service de Physique Nucléaire, 91191 Gif-sur-Yvette, France., Salgado C; Norfolk State University, Norfolk, Virginia 23504, USA., Schott D; Florida International University, Miami, Florida 33199, USA and The George Washington University, Washington, D.C. 20052, USA., Schumacher RA; Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA., Senderovich I; Arizona State University, Tempe, Arizona 85287-1504, USA., Simonyan A; Yerevan Physics Institute, 375036 Yerevan, Armenia., Skorodumina I; University of South Carolina, Columbia, South Carolina 29208, USA., Sokhan D; University of Glasgow, Glasgow G12 8QQ, United Kingdom and Edinburgh University, Edinburgh EH9 3JZ, United Kingdom., Sparveris N; Temple University, Philadelphia, Pennsylvania 19122, USA., Stepanyan S; Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA., Stoler P; Rensselaer Polytechnic Institute, Troy, New York 12180-3590, USA., Strakovsky II; The George Washington University, Washington, D.C. 20052, USA., Strauch S; University of South Carolina, Columbia, South Carolina 29208, USA., Sytnik V; Universidad Técnica Federico Santa María, Casilla 110-V Valparaíso, Chile., Taiuti M; INFN, Sezione di Genova, 16146 Genova, Italy and Università di Genova, 16146 Genova, Italy., Tang W; Ohio University, Athens, Ohio 45701, USA., Tian Y; University of South Carolina, Columbia, South Carolina 29208, USA., Ungaro M; University of Connecticut, Storrs, Connecticut 06269, USA and Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA., Voskanyan H; Yerevan Physics Institute, 375036 Yerevan, Armenia., Voutier E; LPSC, Université Grenoble-Alps, CNRS/IN2P3, Grenoble, France., Walford NK; Catholic University of America, Washington, D.C. 20064, USA., Watts DP; Edinburgh University, Edinburgh EH9 3JZ, 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; University of South Carolina, Columbia, South Carolina 29208, USA and Canisius College, Buffalo, New York 14208, USA., Zachariou N; University of South Carolina, Columbia, South Carolina 29208, USA., Zana L; Edinburgh University, Edinburgh EH9 3JZ, United Kingdom., Zhang J; Old Dominion University, Norfolk, Virginia 23529, USA and Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA., Zonta I; INFN, Sezione di Roma Tor Vergata, 00133 Roma, Italy.
Jazyk: angličtina
Zdroj: Physical review letters [Phys Rev Lett] 2015 Jan 23; Vol. 114 (3), pp. 032001. Date of Electronic Publication: 2015 Jan 22.
DOI: 10.1103/PhysRevLett.114.032001
Abstrakt: A measurement of the electroproduction of photons off protons in the deeply inelastic regime was performed at Jefferson Lab using a nearly 6 GeV electron beam, a longitudinally polarized proton target, and the CEBAF Large Acceptance Spectrometer. Target-spin asymmetries for ep→e^{'}p^{'}γ events, which arise from the interference of the deeply virtual Compton scattering and the Bethe-Heitler processes, were extracted over the widest kinematics in Q^{2}, x_{B}, t, and ϕ, for 166 four-dimensional bins. In the framework of generalized parton distributions, at leading twist the t dependence of these asymmetries provides insight into the spatial distribution of the axial charge of the proton, which appears to be concentrated in its center. These results also bring important and necessary constraints for the existing parametrizations of chiral-even generalized parton distributions.
Databáze: MEDLINE