Probing the Low x Gluon with Exclusive J/ψ Production

Jones, SP, Martin, AD, Ryskin, MG and Teubner, T ORCID: 0000-0002-0680-0776 (2018) Probing the Low x Gluon with Exclusive J/ψ Production. In: XXV International Workshop on Deep-Inelastic Scattering and Related Subjects, 2017-4-3 - ?.

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Official URL: http://dx.doi.org/10.22323/1.297.0032

Abstract

© 2017 Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License (CC BY-NC-ND 4.0). We present an updated and improved extraction of the low-x gluon distribution from the HERA and LHCb exclusive J/ψ production data in the context of kT factorisation. Critically, we use a more precise expression for the photon flux and updated rapidity gap survival factors. In collinear factorisation, exclusive J/ψ photoproduction receives large perturbative corrections at next-to-leading order which depend sensitively on the factorisation scale. This prevents the use of the available data to extract a gluon PDF within this framework. Attempts to understand and overcome the problems caused by the large perturbative corrections are discussed.

Item Type:	Conference or Workshop Item (Unspecified)
Depositing User:	Symplectic Admin
Date Deposited:	25 Jul 2018 06:52
Last Modified:	15 Mar 2024 18:19
DOI:	10.22323/1.297.0032
Open Access URL:	https://pos.sissa.it/297/032
Related URLs:	Publisher
URI:	https://livrepository.liverpool.ac.uk/id/eprint/3024128