Multi-Differential DVCS Cross Section Measurement on the Proton in the Valence Region with CLAS12
S. Lee, T. B. Hayward, L. Elouadrhiri, R. G. Milner, P. Achenbach, J. S. Alvarado, M. J. Amaryan, W. R. Armstrong, H. Avakian, N. A. Baltzell, M. Bashkanov, M. Battaglieri, F. Benmokhtar, A. Bianconi, A. S. Biselli, M. Bondi, S. Boiarinov, F. Bossù, K. -Th. Brinkmann, W. J. Briscoe, N. L. Bucuru Rodriguez, S. Bueltmann, V. D. Burkert, T. Cao, D. S. Carman, A. Celentano, P. Chatagnon, V. Chesnokov, H. Chinchay, G. Ciullo, E. W. Cline, P. L. Cole, M. Contalbrigo, A. D'Angelo, N. Dashyan, R. De Vita, S. Diehl, C. Dilks, C. Djalali, R. Dupre, H. Egiyan, M. Ehrhart, A. El Alaoui, L. El Fassi, C. Fanelli, M. Farooq, S. Fegan, I. P. Fernando, E. Ferrand, A. Filippi, C. Fogler, S. Frantzen, K. Gates, D. I. Glazier, R. W. Gothe, Y. Gotra, B. Gualtieri, K. Hafidi, H. Hakobyan, D. Heddle, M. Hoballah, D. Holmberg, M. Holtrop, Y. Ilieva, D. G. Ireland, E. L. Isupov, H. S. Jo, S. Joosten, M. Kerr, A. Kim, V. Klimenko, I. Korover, A. Kripko, V. Kubarovsky, S. E. Kuhn, C. Lama, L. Lanza, P. Lenisa, X. Li, D. Martiryan, V. Mascagna, B. McKinnon, A. Mehta, Z. E. Meziani, R. Milton, M. Mirazita, V. Mokeev, E. F. Molina Cardenas, P. Moran, S. Muduganti, C. Munoz Camacho, P. Nadel-Turonski, T. Nagorna, K. Neupane, G. Niculescu, M. Osipenko, P. Pandey, M. Paolone, L. L. Pappalardo, R. Paremuzyan, E. Pasyuk, C. Paudel, S. J. Paul, W. Phelps, N. Pilleux, L. Polizzi, J. Poudel, Y. Prok, A. Radic, K. Ramage, M. Ripani, M. Ronayette, P. Rossi, A. A. Rusova, S. Schadmand, A. Schmidt, Y. G. Sharabian, E. V. Shirokov, S. Shrestha, E. Sidoretti, B. Singh, N. Sparveris, S. Stepanyan, I. I. Strakovsky, S. Strauch, J. A. Tan, M. Tenorio, F. Touchte Codjo, R. Tyson, M. Ungaro, D. W. Upton, S. Vallarino, C. Velasquez, L. Venturelli, H. Voskanyan, Y. Wang, U. Weerasinghe, X. Wei, N. Wuerfel, Z. Xu, M. Zurek
Abstract
We report the measurement of the four-fold differential cross section of deeply virtual Compton scattering (DVCS) on the proton using a longitudinally polarized 10.6 GeV CEBAF electron beam incident on a liquid-hydrogen target with the CLAS12 detector. The analysis provides 1312 data points, expanding the measured phase space in the valence quark region, 0.06 < xB < 0.58, 1.00 < Q2 < 5.76 GeV2, and 0.11 < |t| < 1.00 GeV2. DVCS cross section measurements directly constrain the real part of the DVCS amplitude through its interference with the Bethe-Heitler process, making them essential inputs to global extractions of the Compton Form Factors (CFFs), particularly the dominant CFF H. These data improve sensitivity to these observables and can contribute to future determinations of the proton's internal mechanical structure.
Create a lesson
Related papers
Direct measurement of the in-medium η mass spectrum through the γγ decay channel
Y. Matsumura, N. Muramatsu, T. A. Hashimoto et al.
STAR Highlights II: Study of Small Systems and the Search for New, Exotic Physics
Jiangyong Jia
Cluster emission and its impact on the r-process nucleosynthesis
Natalia Thomas, Silvia Bara, Thomas Elias Cocolios et al.
Core Breaking at Low Spin in 68Zn from Nuclear Resonance Fluorescence
S. R. Johnson, R. V. F. Janssens, B. A. Brown et al.
Isoscalar Giant Resonances in the even-A Pd Isotopes
J. Arroyo, U. Garg, T. Furuno et al.
Efficient production of 229m,gTh via neutron capture in VUV-transparent crystals
Zhong-yi Chen, Hao-yang Lan, Di Wu et al.