Dipion and dikaon photoproduction in ultra-peripheral Pb-Pb collisions with ALICE

Abstract

High energy photons originating from the electromagnetic field of ultrarelativistic lead nuclei can interact with the other lead ion. These reactions are studied in the ultra-peripheral heavy ion collisions to probe the physics of strong interactions. The analysis of dipion and dikaon photoproduction was carried out using the ALICE 2015 Pb-Pb data at center-of-mass energy $\sqrt{s}=5.02$ TeV, and 2017 Xe-Xe data at $\sqrt{s}=5.44$ TeV. We present the ${\rho }^0$ meson and direct ${\pi }^{+}{\pi }^{-}$ measurements, as well as the prospects of studying exclusive $K^{+}{K}^{-}$ photoproduction, with sensitivity towards higher dikaon invariant mass above the $\varphi (1020)$ threshold.

5 pages, 3 figures, proceeding of DIS2023: XXX International Workshop on Deep-Inelastic Scattering and Related Subjects, Michigan State University, USA, 27-31 March 2023