Publications
Publication Information
| Title | Measurement of deeply virtual Compton scattering off Helium-4 with CLAS at Jefferson Lab |
| Authors | Raphael Dupre, Mohammad Hattawy, Nathan Baltzell, Stephen Bueltmann, Raffaella De Vita, Ahmed El Alaoui, Lamiaa El Fassi, Hovanes Egiyan, Francois-Xavier Girod-Gard, Michel Guidal, Kawtar Hafidi, David Jenkins, Simonetta Liuti, Yohann Perrin, Stepan Stepanyan, Bayram Torayev, Eric Voutier, Moskov Amaryan, Whitney Armstrong, Hamza Atac, Carlos Ayerbe Gayoso, Luca Barion, Marco Battaglieri, Ivan Bedlinskiy, Fatiha Benmokhtar, Andrea Bianconi, Angela Biselli, Mariangela Bondi, Francesco Bossu, Sergey Boyarinov, William Briscoe, Dilini Bulumulla, Volker Burkert, Daniel Carman, Jose Carvajal, Mylene Caudron, Andrea Celentano, Pierre Chatagnon, Vitaly Chesnokov, Taya Chetry, GIUSEPPE CIULLO, Brandon Clary, Philip Cole, Marco Contalbrigo, Giovanni Costantini, Volker Crede, Annalisa D'Angelo, Natalya Dashyan, Maxime Defurne, Alexandre Deur, Stefan Diehl, Chaden Djalali, Mathieu Ehrhart, Latifa Elouadrhiri, Paul Eugenio, Stuart Fegan, Alessandra Filippi, Tony Forest, Yeranuhi Ghandilyan, Gerard Gilfoyle, Ralf Gothe, Keith Griffioen, Hayk Hakobyan, Timothy Hayward, Ken Hicks, Adam Hobart, Maurik Holtrop, Yordanka Ilieva, David Ireland, Evgeny Isupov, Hyon-Suk Jo, Kyungseon Joo, Sylvester Joosten, Dustin Keller, Grigor Khachatryan, Achyut Khanal, Mahbub Khandaker, Andrey Kim, Wooyoung Kim, Aron Kripko, Valery Kubarovsky, Sebastian Kuhn, Lucilla Lanza, Kenneth Livingston, Md. Latiful Kabir, Marco Leali, Paolo Lenisa, Ian MacGregor, Dominique Marchand, Nikolay Markov, Valerio Mascagna, Michael Mayer, Bryan McKinnon, Marco Mirazita, Viktor Mokeev, Krishna Neupane, Silvia Niccolai, Thomas O'Connell, Mikhail Osipenko, Michael Paolone, Luciano Pappalardo, Rafayel Paremuzyan, Eugene Pasyuk, David Payette, William Phelps, Nikolai Pivnyuk, Oleg Pogorelko, Jiwan Poudel, Yelena Prok, Marco Ripani, James Ritman, Alessandro Rizzo, Guenther Rosner, Patrizia Rossi, Joseph Rowley, Franck Sabatie, Carlos Salgado, Axel Schmidt, Reinhard Schumacher, Viktoriya Sergeyeva, Youri Sharabian, Utsav Shrestha, Daria Sokhan, Orlando Soto Sandoval, Nikolaos Sparveris, Igor Strakovsky, Steffen Strauch, Nicholas Tyler, Maurizio Ungaro, Luca Venturelli, Hakob Voskanyan, Anselm Vossen, Daniel Watts, Kevin Wei, Xiangdong Wei, Lawrence Weinstein, Robert Wishart, Michael Wood, Bradley Yale, Nicholas Zachariou, J. Zhang |
| JLAB number | JLAB-PHY-21-3320 |
| LANL number | arXiv:2102.07419 |
| Other number | DOE/OR/23177-5131 |
| Document Type(s) | (Journal Article) |
| Associated with EIC: | No |
| Supported by Jefferson Lab LDRD Funding: | No |
| Funding Source: | Nuclear Physics (NP) |
|
Journal Compiled for Physical Review C Volume 104 Page(s) 025203 Refereed | |
| Publication Abstract: | We report on the measurement of the beam spin asymmetry in the deeply virtual Compton scattering off 4He using the CEBAF Large Acceptance Spectrometer (CLAS) at Jefferson Lab using a 6 GeV longitudinally polarized electron beam incident on a pressurized 4He gaseous target. We detail the method used to ensure the exclusivity of the measured reactions, in particular the upgrade of CLAS with a radial time projection chamber to detect the low-energy recoiling 4He nuclei and an inner calorimeter to extend the photon detection acceptance at forward angles. Our results confirm the theoretically predicted enhancement of the coherent (e4He ! e04He0 0) beam spin asymmetries compared to those observed on the free proton, while the incoherent (e4He ! e0p0 0X0) asymmetries exhibit a 30% suppression. From the coherent data, we were able to extract, in a model-independent way, the real and imaginary parts of the only 4He Compton form factor, HA, leading the way toward 3D imaging of the partonic structure of nuclei. |
| Experiment Numbers: | E08-024 |
| Group: | Hall B |
| Document: | |
| DOI: | https://doi.org/10.1103/PhysRevC.104.025203 |
| Accepted Manuscript: | 2102.07419.pdf |
| Supporting Documents: | |
| Supporting Datasets: | |