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arXiv · 2404.06518

Light-by-light scattering in ultraperipheral collisions of heavy ions with future FoCal and ALICE 3 detectors

Antoni Szczurek
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Abstract

I present possible future studies of light-by-light scattering using FoCal@ALICE and ALICE 3 detectors. Different mechanisms are discussed. The PbPb$\to$PbPb$\gamma \gamma$ cross section is calculated within equivalent photon approximation in the impact parameter space. Several differential distributions are presented and discussed. We predict cross section in the (mb-b) range for typical ALICE 3 cuts, a few orders of magnitude larger than for the current ATLAS or CMS experiments. We also consider the two-$\pi^0$ background which can, in principle, be eliminated at the new kinematical range for the ALICE 3 measurements by imposing dedicated cuts on diphoton transverse momentum and$\slash$or so-called vector asymmetry.

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Antoni Szczurek. 2024-04-05. Light-by-light scattering in ultraperipheral collisions of heavy ions with future FoCal and ALICE 3 detectors. https://arxiv.org/abs/2404.06518

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