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Exclusive heavy quark-pair production in ultraperipheral collisions

By Mateus Reinke Pelicer, Emmanuel Gräve De Oliveira and Roman Pasechnik

Abstract

In this article, we study the fully differential observables of the exclusive production of heavy (charm and bottom) quark pairs in high-energy ultraperipheral pA and AA collisions. In these processes, the nucleus A serves as an efficient source of the photon flux, while the QCD interaction of the produced heavy-quark pair with the target (p or A) proceeds via an exchange of gluons in a color singlet state, described by the gluon Wigner distribution. The corresponding predictions for differential cross sections were obtained by using the dipole S matrix in the McLerran-Venugopalan saturation model with impact parameter dependence for the nucleus target, and its recent generalization, for the proton target. Prospects of experimental constraints on the gluon Wigner distribution in this class of reactions are discussed

Topics: Subatomic Physics
Publisher: 'American Physical Society (APS)'
Year: 2019
DOI identifier: 10.1103/PhysRevD.99.034016
OAI identifier: oai:lup.lub.lu.se:cc0600ce-be90-42cd-b843-ec6986e64271
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