Gluon recombination in high parton density QCD: Inclusive pion production

Yang Li, Kirill Tuchin

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Abstract

We argue that the collinear factorization of the fragmentation functions in high energy hadron and nuclei collisions breaks down at transverse momenta kT Qs/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 JPC=0++ channel. Using the low energy theorems of QCD we find the inclusive cross-section for π-meson production.

Original languageEnglish (US)
Article number074022
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume75
Issue number7
DOIs
StatePublished - Apr 19 2007

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