BFKL evolution and the growth with energy of exclusive J/Ψ and ϒ photoproduction cross sections

I. Bautista, A. Fernandez Tellez, and M. Hentschinski
Phys. Rev. D 94, 054002 – Published 2 September 2016

Abstract

We investigate whether the Balitsky-Fadin-Kuraev-Lipatov (BFKL) low x evolution equation is capable to describe the energy dependence of the exclusive photo-production cross-section of vector mesons J/Ψ and ϒ on protons. Such cross-sections have been measured by both HERA experiments H1 and ZEUS in electron-proton collisions and by LHC experiments ALICE, CMS and LHCb in ultra-peripheral proton-proton and ultra-peripheral proton-lead collisions. Our approach provides a perturbative description of the rise with energy and relies only on a fit of the initial transverse momentum profile of the proton impact factor, which can be extracted from BFKL fits to inclusive HERA data. We find that BFKL evolution is capable to provide a very good description of the energy dependence of the current data set, while the available fits of the proton impact factor require an adjustment in the overall normalization.

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  • Received 19 July 2016

DOI:https://doi.org/10.1103/PhysRevD.94.054002

© 2016 American Physical Society

Physics Subject Headings (PhySH)

Particles & Fields

Authors & Affiliations

I. Bautista1, A. Fernandez Tellez1, and M. Hentschinski1,2

  • 1Facultad de Ciencias Físico Matemáticas, Benemérita Universidad Autónoma de Puebla, Puebla 1152, Mexico
  • 2Instituto de Ciencias Nucleares, Universidad Nacional Autónoma de México, Apartado Postal 70-543, Ciudad de México 04510, Mexico

  • Corresponding author. martin.hentschinski@gmail.com

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Vol. 94, Iss. 5 — 1 September 2016

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