Gluon saturation and feynman scaling in leading neutron production

Gluon saturation and feynman scaling in leading neutron production

Author Carvalho, Fabiana Autor UNIFESP Google Scholar
Gonçalves, Victor Paulo Google Scholar
Spiering, Diego Google Scholar
Navarra, Fernando Silveira Google Scholar
Abstract In this paper we extend the color dipole formalism for the study of leading neutron production in e + p -> e + n + X collisions at high energies and estimate the related observables which were measured at HERA and could be analyzed in future electron-proton (ep) colliders. In particular, we calculate the Feynman x(F) distribution of leading neutrons, which is expressed in terms of the pion flux and the photon-pion total cross section. In the color dipole formalism, the photon-pion cross section is described in terms of the dipole-pion scattering amplitude, which contains information about the QCD dynamics at high energies and gluon saturation effects. We consider different models for the scattering amplitude, which have been used to describe the inclusive and diffractive ep HERA data. Moreover, the model dependence of our predictions with the description of the pion flux is analyzed in detail. We demonstrate the recently released H1 leading neutron spectra can be described using the color dipole formalism and that these spectra could help us to observe more clearly gluon saturation effects in future ep colliders. (C) 2015 The Authors. Published by Elsevier B.V.
Keywords Quantum Chromodynamics
Leading Particle Production
Saturation EffectsColor Glass Condensate
Deep-Inelastic Scattering
Pion Exchange
Meson Cloud
Flavor Asymmetry
Nucleon Sea
Language English
Sponsor Brazilian funding agency CNPq
Brazilian funding agency CAPES
Brazilian funding agency FAPERGS
Brazilian funding agency FAPESP
Date 2016
Published in Physics Letters B. Amsterdam, v. 752, p. 76-83, 2016.
ISSN 0370-2693 (Sherpa/Romeo, impact factor)
Publisher Public Library Science
Extent 76-83
Access rights Open access Open Access
Type Article
Web of Science ID WOS:000368026000012

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