High-multiplicity pA collisions and the small-x effective action
Abstract
I discuss the p_t distributions for high-multiplicity events originating from semi-classical variation of the gluon density of the proton.The multiplicity distribution measures the curvature of the effective action for the small-x gluon fields. For pA collisions at the RHIC and LHC colliders, semi-classically the multiplicity distribution reflects the distribution of saturation momenta of the proton but not that of the nucleus. The average transverse momentum in the central region grows with dN/dy, while the p_t distribution of leading hadrons in the proton fragmentation region should depend less on the multiplicity in the central region.
Keywords
Cite
@article{arxiv.hep-ph/0210412,
title = {High-multiplicity pA collisions and the small-x effective action},
author = {A. Dumitru},
journal= {arXiv preprint arXiv:hep-ph/0210412},
year = {2007}
}
Comments
6 Pages, 3 Figures; Presented at the Workshop on Coherent Effects at RHIC and LHC: Initial Conditions and Hard Probes'', ECT*, Trento (Italy), October 14-25, 2002, http://pluto.mpi-hd.mpg.de/trento