Harmonic moments of the gluon density distribution in AA collisions

Abstract

By using Monte-Carlo implementations of $k_T$-factorization formula with running-coupling BK unintegrated gluon distributions for nucleus-nucleus collisions, we compute higher order harmonic moments of the initial density distribution for both RHIC(Au+Au@200GeV) and LHC(Pb+Pb@2.76TeV) collisions. We study their sensitivity to the size of the valence parton distribution in the nucleon.

Comments: 4 pages, 2 figures, references added, figure 2 is replaced by the results of central collisions