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Title: Gluon recombination in high parton density QCD: Inclusive pion production

Abstract

We argue that the collinear factorization of the fragmentation functions in high energy hadron and nuclei collisions breaks down at transverse momenta k{sub T} < or approx. Q{sub s}/g due to high parton densities in the colliding hadrons and/or nuclei. We calculate, at next-to-leading order in projectile parton density and to all orders in target parton density, the double-inclusive cross-section for production of a pair of gluons in the scalar J{sup PC}=0{sup ++} channel. Using the low energy theorems of QCD we find the inclusive cross-section for {pi}-meson production.

Authors:
 [1];  [1];  [2]
  1. Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011 (United States)
  2. (United States)
Publication Date:
OSTI Identifier:
21020282
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review. D, Particles Fields; Journal Volume: 75; Journal Issue: 7; Other Information: DOI: 10.1103/PhysRevD.75.074022; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; CROSS SECTIONS; DENSITY; FACTORIZATION; GLUONS; LOW-ENERGY THEOREM; PARTICLE PRODUCTION; PIONS; QUANTUM CHROMODYNAMICS; RECOMBINATION; S QUARKS; SCALARS; TRANSVERSE MOMENTUM

Citation Formats

Li Yang, Tuchin, Kirill, and RIKEN BNL Research Center, Upton, New York 11973-5000. Gluon recombination in high parton density QCD: Inclusive pion production. United States: N. p., 2007. Web. doi:10.1103/PHYSREVD.75.074022.
Li Yang, Tuchin, Kirill, & RIKEN BNL Research Center, Upton, New York 11973-5000. Gluon recombination in high parton density QCD: Inclusive pion production. United States. doi:10.1103/PHYSREVD.75.074022.
Li Yang, Tuchin, Kirill, and RIKEN BNL Research Center, Upton, New York 11973-5000. Sun . "Gluon recombination in high parton density QCD: Inclusive pion production". United States. doi:10.1103/PHYSREVD.75.074022.
@article{osti_21020282,
title = {Gluon recombination in high parton density QCD: Inclusive pion production},
author = {Li Yang and Tuchin, Kirill and RIKEN BNL Research Center, Upton, New York 11973-5000},
abstractNote = {We argue that the collinear factorization of the fragmentation functions in high energy hadron and nuclei collisions breaks down at transverse momenta k{sub T} < or approx. Q{sub s}/g due to high parton densities in the colliding hadrons and/or nuclei. We calculate, at next-to-leading order in projectile parton density and to all orders in target parton density, the double-inclusive cross-section for production of a pair of gluons in the scalar J{sup PC}=0{sup ++} channel. Using the low energy theorems of QCD we find the inclusive cross-section for {pi}-meson production.},
doi = {10.1103/PHYSREVD.75.074022},
journal = {Physical Review. D, Particles Fields},
number = 7,
volume = 75,
place = {United States},
year = {Sun Apr 01 00:00:00 EDT 2007},
month = {Sun Apr 01 00:00:00 EDT 2007}
}