Effects of gluon number fluctuations onγγcollisions at high energies

2012/07/31 by V. P. Gonçalves, M. B. Gay Ducati, V. P. Goncalves +2
Mathematics · Physics and Astronomy · #Algorithm #High-Energy Particle Collisions Research #Mathematics #Particle physics theoretical and experimental studies #Physics #Quantum Chromodynamics and Particle Interactions #hep-ex #hep-ph

paper · pdf · doi:10.1103/physrevd.86.054019

9 pages, 6 figures. Improved version with two new figures. Version to be published in Physical Review D

arxiv created 2012/09/04 · openalex publication_date 2012/09/24 · arxiv updated 2015/06/05 · openalex created_date 2019/07/30 · openalex updated_date 2026/08/05

Abstract

We investigate the effects of gluon number fluctuations on the total \ensuremathγ\ensuremathγ, \ensuremathγ^*\ensuremathγ^* cross sections and the photon structure function F₂^\ensuremathγ(x,Q²). Considering a model which relates the dipole-dipole and dipole-hadron scattering amplitudes, we estimate these observables by using event-by-event and physical amplitudes. We demonstrate that both analyses are able to describe the LEP data, but predict different behaviors for the observables at high energies, with the gluon fluctuations effects decreasing the cross sections. We conclude that the study of \ensuremathγ\ensuremathγ interactions can be useful to constrain the QCD dynamics.

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