Baryon enhancement in high-density QCD and relativistic heavy ion collisions

Details Baryon enhancement in high-density QCD and relativistic heavy ion collisions Baryon enhancement in high-density QCD and relativistic heavy ion collisions

2008-03-28

arxiv.org/abs/0803.4139v1

J.Phys.G35:104051,2008

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 pages, 2 figure; Contribution to Quark Matter 2008 in Jaipur, India; submitted to J. Phys. G

Scientific paper

10.1088/0954-3899/35/10/104051

We argue that the collinear factorization of the fragmentation functions in high energy nuclear collisions breaks down at transverse momenta $p_T \lesssim Q_s/g$ due to high parton densities in the colliding hadrons and/or nuclei. We find that gluon recombination dominates in that $p_T$ region. We calculate the inclusive cross-section for $\pi$ meson and nucleon production using the low energy theorems for the scale anomaly in QCD, and compare our quantitative baryon-to-meson ratio to the RHIC data.

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