Multi-Differential DVCS Cross Section Measurement on the Proton in the Valence Region with CLAS12
Year: 2026
Type: preprint
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 < $x_B$ < 0.58, 1.00 < $Q^2$ < 5.76 GeV$^2$, and 0.11 < $|t|$ < 1.00 GeV$^2$. 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.
Source: arXiv (Cornell University)
Authors: Lee, S., Hayward, T. B., Elouadrhiri, L., Milner, R. G., Achenbach, P., Alvarado, J. S., Amaryan, M. J., Armstrong, W. R., Avakian, H., Baltzell, N. A., Bashkanov, M., Battaglieri, M., Benmokhtar, F., Bianconi, A., Biselli, A. S., Bondi, M., Boiarinov, S., Bossù, F., Brinkmann, K. -Th., Briscoe, W. J., Rodriguez, N. L. Bucuru, Bueltmann, S., Burkert, V. D., Cao, T., Carman, D. S., Celentano, A., Chatagnon, P., Chesnokov, V., Chinchay, H., Ciullo, G., Cline, E. W., Cole, P. L., Contalbrigo, M., D'Angelo, A., Dashyan, N., De Vita, R., Diehl, S., Dilks, C., Djalali, C., Dupre, R., Egiyan, H., Ehrhart, M., Alaoui, A. El, Fassi, L. El, Fanelli, C., Farooq, M., Fegan, S., Fernando, I. P., Ferrand, E., Filippi, A., Fogler, C., Frantzen, S., Gates, K., Glazier, D. I., Gothe, R. W., Gotra, Y., Gualtieri, B., Hafidi, K., Hakobyan, H., Heddle, D., Hoballah, M., Holmberg, D., Holtrop, M., Ilieva, Y., Ireland, D. G., Isupov, E. L., Jo, H. S., Joosten, S., Kerr, M., Kim, A., Klimenko, V., Korover, I., Kripko, A., Kubarovsky, V., Kuhn, S. E., Lama, C., Lanza, L., Lenisa, P., Li, X., Martiryan, D., Mascagna, V., McKinnon, B., Mehta, A., Meziani, Z. E., Milton, R., Mirazita, M., Mokeev, V., Cardenas, E. F. Molina, Moran, P., Muduganti, S., Camacho, C. Munoz, Nadel-Turonski, P., Nagorna, T., Neupane, K., Niculescu, G., Osipenko, M., Pandey, P., Paolone, M., Pappalardo, L. L., Paremuzyan, R., Pasyuk, E., Paudel, C., Paul, S. J., Phelps, W., Pilleux, N., Polizzi, L., Poudel, J., Prok, Y., Radic, A., Ramage, K., Ripani, M., Ronayette, M., Rossi, P., Rusova, A. A., Schadmand, S., Schmidt, A., Sharabian, Y. G., Shirokov, E. V., Shrestha, S., Sidoretti, E., Singh, B., Sparveris, N., Stepanyan, S., Strakovsky, I. I., Strauch, S., Tan, J. A., Tenorio, M., Codjo, F. Touchte, Tyson, R., Ungaro, M., Upton, D. W., Vallarino, S., Velasquez, C., Venturelli, L., Voskanyan, H., Wang, Y., Weerasinghe, U., Wei, X., Wuerfel, N., Xu, Z., Zurek, M.
Institutions: Argonne National Laboratory, Massachusetts Institute of Technology, Thomas Jefferson National Accelerator Facility, Christopher Newport University, Centre National de la Recherche Scientifique, Université Paris-Saclay, Institut National de Physique Nucléaire et de Physique des Particules, Laboratoire de Physique des 2 Infinis Irène Joliot-Curie, Old Dominion University, University of York, Istituto Nazionale di Fisica Nucleare, Sezione di Genova, Duquesne University, Istituto Nazionale di Fisica Nucleare, Sezione di Pavia, University of Brescia, Fairfield University, Istituto Nazionale di Fisica Nucleare, Sezione di Catania, Commissariat à l'Énergie Atomique et aux Énergies Alternatives, CEA Paris-Saclay, Institut de Recherche sur les Lois Fondamentales de l'Univers, Justus-Liebig-Universität Gießen, George Washington University, University of Genoa, Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, University of New Hampshire, University of Ferrara, Istituto Nazionale di Fisica Nucleare, Sezione di Ferrara, Lamar University, University of Rome Tor Vergata, Istituto Nazionale di Fisica Nucleare, Roma Tor Vergata, A. Alikhanyan National Laboratory, University of Connecticut, Ohio University, Universidad Técnica Federico Santa María, Temple University, Mississippi State University, William & Mary, University of Virginia, Istituto Nazionale di Fisica Nucleare, Sezione di Torino, University of Glasgow, University of South Carolina, Florida International University, Kyungpook National University, Office National d'Études et de Recherches Aérospatiales, Tel Aviv University, Shandong University, New Mexico State University, University of California, Riverside, Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Frascati, University of La Serena, James Madison University, GSI Helmholtz Centre for Heavy Ion Research
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
Funders: National Science Foundation, U.S. Department of Energy, Scottish Universities Physics Alliance, National Research Foundation, United States-Israel Binational Science Foundation, National Research Foundation of Korea, Centre National de la Recherche Scientifique, Istituto Nazionale di Fisica Nucleare, Lomonosov Moscow State University, Agencia Nacional de Investigación y Desarrollo, Office of Science, Science and Technology Facilities Council, Nuclear Physics, Thomas Jefferson National Accelerator Facility
OpenAlex ID: W7204069403