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arXiv · 1812.05574

Photon-photon scattering in the resonance region at midrapidity at the LHC

R. Schicker·Mariola Klusek-Gawenda·A. Szczurek
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Abstract

A study is presented to extend the measurements of photon-photon scattering in ultra-peripheral Pb-Pb collisions at the LHC into the mass region of the pseudoscalar resonances $η$ and $η'$. The elementary photon-photon scattering cross section is presented. The cross section for photon-photon scattering in Pb-Pb is derived by convoluting the elementary photon-photon cross section with the Pb-Pb photon luminosity. The main background to two-photon final states, arising from double $π^{0}$ production with two of the four decay photons escaping detection, is examined, and possible kinematical conditions are discussed to optimize the signal-to-background ratio for such measurements at mid-rapidity.

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R. Schicker, Mariola Klusek-Gawenda, A. Szczurek. 2018-12-13. Photon-photon scattering in the resonance region at midrapidity at the LHC. https://arxiv.org/abs/1812.05574

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