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High Energy Physics - Phenomenology

arXiv:1503.00513 (hep-ph)
[Submitted on 2 Mar 2015 (v1), last revised 29 May 2015 (this version, v2)]

Title:Factorization model for distributions of quarks in hadrons

Authors:B.I. Ermolaev, M. Greco, S.I. Troyan
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Abstract:We consider distributions of unpolarized (polarized) quarks in unpolarized (polarized) hadrons. Our approach is based on QCD factorization. We begin with study of Basic factorization for the parton-hadron scattering amplitudes in the forward kinematics and suggest a model for non-perturbative contributions to such amplitudes. This model is based on the simple observation: after emitting an active quark by the initial hadron, the remaining set quarks and gluons becomes unstable, so description of this colored state can approximately be done in terms of resonances, which leads to expressions of the Breit-Wigner type. for non-perturbative contributions to the distributions of unpolarized and polarized quarks in the hadrons. Then we reduce these formulae to obtain explicit expressions for the quark-hadron scattering amplitudes and quark distributions in K_T- and Collinear factorizations.
Comments: 18 pp, 7 figures. In the present version we include a discussion on rapidity divergences, correct some unclearly presented issues and eliminate misprints
Subjects: High Energy Physics - Phenomenology (hep-ph)
Cite as: arXiv:1503.00513 [hep-ph]
  (or arXiv:1503.00513v2 [hep-ph] for this version)
  https://doi.org/10.48550/arXiv.1503.00513

Submission history

From: Boris Ermolaev [view email]
[v1] Mon, 2 Mar 2015 13:16:07 UTC (157 KB)
[v2] Fri, 29 May 2015 09:17:23 UTC (203 KB)
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