Exclusive J/psi Process Tamed to Probe the Low-x Gluon



Jones, SP, Martin, AD, Ryskin, MG, Teubner, T and AIP
(2017) Exclusive J/psi Process Tamed to Probe the Low-x Gluon. In: DIFFRACTION 2016: International Workshop on Diffraction in High-Energy Physics.

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Abstract

We address the question as to whether data for J/ψ mesons produced exclusively in the forward direction at the LHC can be used in global parton analyses (based on collinear factorization) to pin down the low-x gluon PDF. We show that it may be possible to overcome the problems that (i) the process is described by a skewed or Generalized Parton Distribution (GPD), (ii) it is very sensitive to the choice of factorization scale and (iii) there is bad LO, NLO,⋯ perturbative stability to the predictions. However, we start by briefly explaining how the alternative kT-factorization approach has been used to describe the process.

Item Type: Conference or Workshop Item (Unspecified)
Uncontrolled Keywords: 4902 Mathematical Physics, 5107 Particle and High Energy Physics, 49 Mathematical Sciences, 51 Physical Sciences
Depositing User: Symplectic Admin
Date Deposited: 25 Apr 2017 06:47
Last Modified: 21 Jun 2024 05:19
DOI: 10.1063/1.4977145
Related URLs:
URI: https://livrepository.liverpool.ac.uk/id/eprint/3007109