Nuclear Physics Seminar

"Probing the odderon through eta_c production in diffractive collisions at the EIC with non-linear evolution effects"

Presented by Abhiram Kaushik, Zagreb University

Tuesday, June 27, 2023, 11:00 am — Small Seminar Room, Bldg. 510

Abstract: The production of eta_c in diffractive ep and eA collisions has been suggested as a golden probe of the C-odd QCD interaction, the odderon. Previous studies of this process have considered a linearised Bartels-Kwiecinski-Praszalowicz odderon [1-3], which is appropriate in the dilute regime where the x region probed in the proton is not too small. In this work [4], we explore this process in the dense regime, i.e., at low-x values in the proton or in large nuclei where effects of gluon saturation may become important. We treat the energy evolution of the odderon using the running coupling Balitsky-Kovchegov equation which incorporates saturation effects and present numerical estimates for eta_c production in diffractive ep and eA (Au, Cu, Al) at the Electron-Ion Collider (EIC). As the initial condition for odderon evolution, we adopt a Jeon-Venugopalan model [5] based odderon, with the overall normalisation being fixed by a group theoretic constraint [6,7] which gives us an upper bound for the size of the odderon, as well as the cross-section. By studying the dependence of eta_c production on different kinematics and nuclear size, and the relative sizes of the QCD and QED contributions, we aim to identify the ideal scenario to get a signal for the odderon at the EIC.

1) R. Engel, D. Y. Ivanov, R. Kirschner, and L. Szymanowski, Eur. Phys. J. C 4, 93 (1998)
2) J. Czyzewski, J. Kwiecinski, L. Motyka, and M. Sadzikowski, Phys. Lett. B 398, 400 (1997)
3) A. Dumitru and T. Stebel, Phys. Rev. D 99, 094038 (2019)
4) S. Benic, D. Horvatic, A. Kaushik, and E. Vivoda, in preparation
5) S. Jeon and R. Venugopalan, Phys. Rev. D 71, 125003 (2005)
6) T. Lappi, A. Ramnath, K. Rummukainen, and H. Weigert, Phys. Rev. D 94, 054014 (2016)
7) N. Kaiser, Journal of Physics A: Mathematical and General 39, 15287 (2006)

Hosted by: Joao Lourenco Henriques Barata

Join Videoconference More Information

19042  |  INT/EXT  |  Events Calendar


Not all computers/devices will add this event to your calendar automatically.

A calendar event file named "calendar.ics" will be placed in your downloads location. Depending on how your device/computer is configured, you may have to locate this file and double click on it to add the event to your calendar.

Event dates, times, and locations are subject to change. Event details will not be updated automatically once you add this event to your own calendar. Check the Lab's Events Calendar to ensure that you have the latest event information.