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Light-by-light scattering in UPC at the LHC

descriptionPublicationkeyboard_double_arrow_right Article , Preprint , Other literature type 09 Nov 2016Embargo end date: 01 Jan 2016Publisher:Sissa MedialabJournal:Proceedings of XXIV International Workshop on Deep-Inelastic Scattering and Related Subjects — PoS(DIS2016)

Authors: Piotr Lebiedowicz; Mariola Klusek-Gawenda; Antoni Szczurek;

doi: 10.22323/1.265.0185 , 10.48550/arxiv.1606.09038

arXiv: http://arxiv.org/abs/1606.09038

Light-by-light scattering in UPC at the LHC

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Abstract

We discuss diphoton semi(exclusive) production in ultraperipheral $PbPb$ collisions at energy of $\sqrt{s_{NN}}=$ 5.5 TeV (LHC). The nuclear calculations are based on equivalent photon approximation in the impact parameter space. The cross sections for elementary $��\to ��$ subprocess are calculated including two different mechanisms: box diagrams with leptons and quarks in the loops and a VDM-Regge contribution with virtual intermediate hadronic excitations of the photons. We got relatively high cross sections in $PbPb$ collisions ($306$ nb). This opens a possibility to study the $��\to ��$ (quasi)elastic scattering at the LHC. We find that the cross section for elastic $��$ scattering could be measured in the lead-lead collisions for the diphoton invariant mass $W_{��} \approx 15-20$ GeV.

5 pages, 5 figures, talk given at 24th International Workshop on Deep-Inelastic Scattering and Related Subjects (DIS 2016), 11-15 April 2016, DESY Hamburg, Germany

Related Organizations

Polish Academy of Learning
Poland
Polish academy of Science
Poland
Institute of Nuclear Physics Polish Academy of Sciences
Poland
Polish Academy of Sciences
Poland
Rzeszów University
Poland

Keywords

High Energy Physics - Phenomenology, High Energy Physics - Phenomenology (hep-ph), FOS: Physical sciences

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