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Publication Information
| Title | First Exclusive Measurement of Deeply Virtual Compton Scattering off $^4$He: Toward the 3D Tomography of Nuclei | ||||
| Abstract | We report on the first measurement of the beam-spin asymmetry in the exclusive process of coherent deeply virtual Compton scattering off a nucleus. The experiment used the 6 GeV electron beam from the CEBAF accelerator at Jefferson Lab incident on a pressurized $^4$He gaseous target placed in front of the CEBAF Large Acceptance Spectrometer (CLAS). The scattered electron was detected by CLAS and the photon by a dedicated electromagnetic calorimeter at forward angles. To ensure the exclusivity of the process, a specially designed radial time projection chamber was used to detect the recoiling $^4$He nuclei. We measured beam-spin asymmetries larger than those observed on the free proton in the same kinematic domain. From these, we were able to extract, in a model-independent way, the real and imaginary parts of the only $^4$He Compton form factor, $\cal H_A$. This first measurement of coherent deeply virtual Compton scattering on the $^4$He nucleus, with a fully exclusive final state via | ||||
| Author(s) | Mohammad Mohammad Hattawy, Nathan Baltzell, Raphael Dupre, Kawtar Hafidi, Stepan Stepanyan, Stephen Bueltmann, Raffaella De Vita, Ahmed El Alaoui, Lamiaa El Fassi, Hovanes Egiyan, Francois-Xavier Girod-Gard, Michel Guidal, David Jenkins, Simonetta Liuti, Yohann Perrin, Bayram Torayev, Eric Voutier, Krishna Adhikari, Shankar Adhikari, Dasuni Adikaram, Zulkaida Akbar, Moskov Amaryan, Sergio Pereira, Whitney Armstrong, Harut Avagyan, Jacques Ball, Mikhail Bashkanov, Marco Battaglieri, V. Batourine, Ivan Bedlinskiy, Angela Biselli, Sergey Boyarinov, Bill Briscoe, Will Brooks, Volker Burkert, Frank Cao, Daniel Carman, Andrea Celentano, Gabriel Charles, Taya Chetry, Giuseppe Ciullo, L. Clark, Luca Colaneri, Phil Cole, Marco Contalbrigo, Olga Cortes Becerra, Volker Crede, Annalisa D'Angelo, Natalya DASHYAN, Enzo De Sanctis, Alexandre Deur, Chaden Djalali, Latifa Elouadrhiri, Paul Eugenio, Gleb Fedotov, Stuart Fegan, Robert Fersch, Alessandra Filippi, Jamie Fleming, Tony Forest, Ahmed Fradi, Michel Garcon, Nerses Gevorgyan, Yeranuhi Ghandilyan, Jerry Gilfoyle, Kevin Giovanetti, Colin Gleason, Wesley Gohn, Evgeny Golovach, Ralf Gothe, Keith Griffioen, Lei Guo, Hayk Hakobyan, Charles Hanretty, Nathan Harrison, David Heddle, Ken Hicks, Maurik Holtrop, Simon Hughes, David Ireland, Boris Ishkhanov, Evgeny Isupov, Hao Jiang, Kyungseon Joo, Sylvester Joosten, Dustin Keller, Grigor Khachatryan, Mariana Khachatryan, Mahbub Khandaker, Andrey Kim, Wooyoung Kim, Andi Klein, Franz Klein, Valery Kubarovsky, Sebastian Kuhn, Sergey Kuleshov, Lucilla Lanza, Paolo Lenisa, Kenneth Livingston, Haiyun Lu, Ian Macgregor, Nikolay Markov, Michael Mayer, Michael McCracken, Bryan McKinnon, Curtis Meyer, Zein-Eddine Meziani, Taisiya Mineeva, Marco Mirazita, Viktor Mokeev, Rachel Montgomery, Herve Moutarde, Aram Movsisyan, Carlos Munoz Camacho, Pawel Nadel-Turonski, Lelia Net, Silvia Niccolai, Gabriel Niculescu, Maria Niculescu, Mikhail Osipenko, Alexander Ostrovidov, Michael Paolone, Rafayel Paremuzyan, K. Park, Eugene Pasyuk, Evan Phelps, William Phelps, Silvia Pisano, Oleg Pogorelko, John Price, Yelena Prok, Dan Protopopescu, Marco Ripani, Barry Ritchie, Alessandro Rizzo, Guenther Rosner, Patrizia Rossi, Franck Sabatie, Carlos Salgado, Reinhard Schumacher, Erin Seder, Youri Sharabian, Ani Simonyan, Iuliia Skorodumina, Greg Smith, Daria Sokhan, Nikos Sparveris, Steffen Strauch, Mauro Taiuti, Maurizio Ungaro, Hakob Voskanyan, Natalie Walford, Daniel Watts, Xiangdong Wei, Larry Weinstein, Mike Wood, Nicholas Zachariou, Lorenzo Zana, J. Zhang, Zhiwen Zhao | ||||
| Publication Date | November 2017 | ||||
| Document Type | Journal Article | ||||
| Primary Institution | Thomas Jefferson National Accelerator Facility, Newport News | ||||
| Affiliation | Exp Nuclear Physics / Experimental Halls / Hall B | ||||
| Funding Source | Nuclear Physics (NP) | ||||
| 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 | 119 |
| Issue | 20 |
| Page(s) | 202004 |
Attachments/Datasets/DOI Link
| Document(s) |
1707.03361.pdf
(STI Document)
dvcs_he4_prl-final-published-version.pdf
(Accepted Manuscript)
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| DOI Link | |
| Dataset(s) | (none) |
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