Light nuclei photoproduction in relativistic heavy ion ultraperipheral collisions

2024/07/08 by Jin-Yu Hu, Hu, Jin-Yu, Shuo Lin +5
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #High-Energy Particle Collisions Research #Nuclear Theory (nucl-th) #Quantum Chromodynamics and Particle Interactions

paper · pdf · doi:10.48550/arxiv.2407.06091

openalex publication_date 2024/07/08 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We have investigated light nuclei pair photoproduction in relativistic heavy ion ultraperipheral collisions. As a first attempt, we employ our previously developed quantum electrodynamics model, which incorporates a wave-packet description of initial nuclei, to compute the cross section for proton-antiproton pair photoproduction. The effective vertex for the photon and proton interaction is chosen based on studies of two-photon exchange effects in hadron physics. We present the transverse momentum, invariant mass, and azimuthal angle distributions of proton-antiproton pairs at √s_NN=200 GeV in Au+Au ultraperipheral collisions. We observe a cos(2ϕ) modulation and an almost negligible cos(4ϕ) modulation in the azimuthal angle distribution. Our studies helps us better understand the matter generated by light.

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