arXiv : Exclusive and diffractive $\gamma \gamma$ production in $PbPb$ collisions at the LHC, HE - LHC and FCC

Coelho, R.O.; Rangel, M.; Gonçalves, V.P.; Martins, D.E.

doi:10.1140/epjc/s10052-020-8006-7

Article
Report number	arXiv:2002.03902
Title	Exclusive and diffractive $\gamma \gamma$ production in $PbPb$ collisions at the LHC, HE - LHC and FCC
Author(s)	Coelho, R.O. (Pelotas U.) ; Gonçalves, V.P. (Pelotas U.) ; Martins, D.E. (Rio de Janeiro Federal U.) ; Rangel, M. (Rio de Janeiro Federal U.)
Publication	2020-05-30
Imprint	2020-02-10
Number of pages	11
Note	10 pages, 4 figures, 3 tables
In:	Eur. Phys. J. C 80, 5 (2020) pp.488
DOI	10.1140/epjc/s10052-020-8006-7 10.1140/epjc/s10052-020-8006-7 (publication)
Subject category	hep-ex ; Particle Physics - Experiment ; hep-ph ; Particle Physics - Phenomenology
Accelerator/Facility, Experiment	CERN LHC
Abstract	In this paper we present a detailed analysis of the contribution of the Light -- by -- Light (LbL), Durham and double diffractive processes for the diphoton production in ultraperipheral $PbPb$ collisions at the Large Hadron Collider (LHC), High -- Energy LHC (HE -- LHC) and Future Circular Collider (FCC). The acceptance of the central and forward LHC detectors is taken into account and predictions for the invariant mass, rapidity, transverse momentum and acoplanarity distributions are presented. Our results indicate that the contribution of the Durham and double diffractive processes can be strongly suppressed by the exclusivity cuts, which will allow to perform a precise analysis of the LbL scattering, as well the search of beyond Standard Model physics in this final state.
Copyright/License	preprint: (License: arXiv nonexclusive-distrib 1.0) CC-BY-4.0

$Diphoton production in $PbPb$ collisions by (a) the Light -- by -- Light scattering, (b) the central exclusive process induced by gluons (Durham process), and the double diffractive processes induced by (c) gluons and (d) quarks of the Pomeron ($\pom$).$ $Diphoton production in $PbPb$ collisions by (a) the Light -- by -- Light scattering, (b) the central exclusive process induced by gluons (Durham process), and the double diffractive processes induced by (c) gluons and (d) quarks of the Pomeron ($\pom$).$ $Diphoton production in $PbPb$ collisions by (a) the Light -- by -- Light scattering, (b) the central exclusive process induced by gluons (Durham process), and the double diffractive processes induced by (c) gluons and (d) quarks of the Pomeron ($\pom$).$ Show more plots

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