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Publication Information
| Title | Longitudinal target-spin asymmetries for deeply virtual Compton scattering | ||||
| Abstract | 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'y events, which arise from the interference of the deeply virtual Compton scattering and the Bethe-Heitler processes, were extracted over the widest kinematics in Q2, xB, t and phi, for 166 four-dimensional bins. In the framework of Generalized Parton Distributions (GPDs), at leading twist the t dependence of these asymmetries provides insight on 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 GPDs. | ||||
| Author(s) | Erin Seder, Angela Biselli, Silvia Pisano, Silvia Niccolai, Greg Smith, Kyungseon Joo, Krishna Adhikari, Moskov Amaryan, M. Anderson, Harut Avagyan, Marco Battaglieri, Ivan Bedlinskiy, Jason Bono, Sergey Boyarinov, Peter Bosted, Bill Briscoe, James Brock, Will Brooks, Stephen Bueltmann, Volker Burkert, Daniel Carman, Chris Carlin, Andrea Celentano, Shloka Chandavar, Gabriel Charles, Luca Colaneri, Phil Cole, Marco Contalbrigo, Don Crabb, Volker Crede, Annalisa D'Angelo, Natalya DASHYAN, Raffaella De Vita, Enzo De Sanctis, Alexandre Deur, Chaden Djalali, Dave Doughty, Raphael Dupre, Lamiaa El Fassi, Latifa Elouadrhiri, Paul Eugenio, Gleb Fedotov, Stuart Fegan, Alessandra Filippi, Jamie Fleming, Ahmed Fradi, Brice Garillon, Michel Garcon, Nerses Gevorgyan, Yeranuhi Ghandilyan, Kevin Giovanetti, Francois-Xavier Girod-Gard, John Goetz, Wesley Gohn, Ralf Gothe, Keith Griffioen, Baptiste Guegan, Michel Guidal, Lei Guo, Kawtar Hafidi, Hayk Hakobyan, Charles Hanretty, Nathan Harrison, Mohammad Hattawy, Nicholas Hirlinger Saylor, Maurik Holtrop, Simon Hughes, Yordanka Ilieva, David Ireland, Boris Ishkhanov, Evgeny Isupov, Hyon-Suk Jo, Sylvester Joosten, Christopher Keith, Dustin Keller, Grigor Khachatryan, Mahbub Khandaker, Andrey Kim, Wooyoung Kim, Andi Klein, Franz Klein, Suman Koirala, Valery Kubarovsky, Sebastian Kuhn, Paolo Lenisa, Kenneth Livingston, Haiyun Lu, Ian Macgregor, Nikolay Markov, Michael Mayer, Bryan McKinnon, Dave Meekins, Taisiya Mineeva, Marco Mirazita, Viktor Mokeev, Rachel Montgomery, Cristina Moody, Herve Moutarde, Aram Movsisyan, Carlos Munoz Camacho, Pawel Nadel-Turonski, Maria Niculescu, Mikhail Osipenko, Alexander Ostrovidov, Michael Paolone, Luciano Pappalardo, Kil Park, Sungkyun Park, Eugene Pasyuk, Peng Peng, William Phelps, Oleg Pogorelko, John Price, Yelena Prok, Dan Protopopescu, Andrew Puckett, Marco Ripani, Alessandro Rizzo, Guenther Rosner, Patrizia Rossi, Priyashree Roy, Franck Sabatie, Carlos Salgado, Diane Schott, Reinhard Schumacher, Igor Senderovich, Ani Simonyan, Iuliia Skorodumina, Daria Sokhan, Nikos Sparveris, Stepan Stepanyan, Paul Stoler, Steffen Strauch, Valeriy Sytnik, Mauro Taiuti, Wei Tang, Ye Tian, Maurizio Ungaro, Hakob Voskanyan, Eric Voutier, Natalie Walford, Daniel Watts, Xiangdong Wei, Larry Weinstein, Mike Wood, Nicholas Zachariou, Lorenzo Zana, J. Zhang, Irene Zonta | ||||
| Publication Date | January 2015 | ||||
| Document Type | Journal Article | ||||
| Primary Institution | Thomas Jefferson National Accelerator Facility, Newport News | ||||
| Affiliation | Exp Nuclear Physics / Experimental Halls / Hall C | ||||
| Funding Source | |||||
| Proprietary? | No | ||||
| This publication conveys | Technical Science Results | ||||
| Document Numbers |
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| Associated with an experiment | No | ||||
| Associated with EIC | No | ||||
| Supported by Jefferson Lab LDRD Funding | No |
Journal Article
| Journal Name | Physical Review Letters |
| Refereed | Yes |
| Volume | 114 |
| Issue | 03 |
| Page(s) | 032001 |
Attachments/Datasets/DOI Link
| Document(s) |
1410.6615v1.pdf
(STI Document)
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| DOI Link | |
| Dataset(s) | (none) |
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