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Title: Effects of fluctuations on the initial eccentricity from the color glass condensate in heavy ion collisions

Abstract

We introduce a modified form of the Kharzeev-Levin-Nardi (KLN) approach for nuclear collisions. The new ansatz for the unintegrated gluon distribution function preserves factorization, and the saturation scale is bound from below by that for a single nucleon. It also reproduces the correct scaling with the number of collisions at high transverse momentum. The corresponding Monte Carlo implementation allows us to account for fluctuations of the hard sources (nucleons) in the transverse plane. We compute various definitions of the eccentricity within the new approach, which are relevant for the interpretation of the elliptic flow. Our approach predicts breaking of the scaling of the eccentricity with the Glauber eccentricity at the level of about 30%.

Authors:
 [1];  [2]
  1. Frankfurt Institute for Advanced Studies (FIAS), Johann Wolfgang Goethe-Universitaet, Max-von-Laue-Str. 1, D-60438 Frankfurt (Germany)
  2. Institut fuer Theoretische Physik, Johann Wolfgang Goethe-Universitaet, Max-von-Laue-Str. 1, D-60438 Frankfurt (Germany)
Publication Date:
OSTI Identifier:
20995154
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review. C, Nuclear Physics; Journal Volume: 75; Journal Issue: 3; Other Information: DOI: 10.1103/PhysRevC.75.034905; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; COLLISIONS; CONDENSATES; DISTRIBUTION FUNCTIONS; FLUCTUATIONS; GLASS; GLUONS; HEAVY ION REACTIONS; MONTE CARLO METHOD; NUCLEONS; QUARK MATTER; SCALING; TRANSVERSE MOMENTUM

Citation Formats

Drescher, Hans-Joachim, and Nara, Yasushi. Effects of fluctuations on the initial eccentricity from the color glass condensate in heavy ion collisions. United States: N. p., 2007. Web. doi:10.1103/PHYSREVC.75.034905.
Drescher, Hans-Joachim, & Nara, Yasushi. Effects of fluctuations on the initial eccentricity from the color glass condensate in heavy ion collisions. United States. doi:10.1103/PHYSREVC.75.034905.
Drescher, Hans-Joachim, and Nara, Yasushi. Thu . "Effects of fluctuations on the initial eccentricity from the color glass condensate in heavy ion collisions". United States. doi:10.1103/PHYSREVC.75.034905.
@article{osti_20995154,
title = {Effects of fluctuations on the initial eccentricity from the color glass condensate in heavy ion collisions},
author = {Drescher, Hans-Joachim and Nara, Yasushi},
abstractNote = {We introduce a modified form of the Kharzeev-Levin-Nardi (KLN) approach for nuclear collisions. The new ansatz for the unintegrated gluon distribution function preserves factorization, and the saturation scale is bound from below by that for a single nucleon. It also reproduces the correct scaling with the number of collisions at high transverse momentum. The corresponding Monte Carlo implementation allows us to account for fluctuations of the hard sources (nucleons) in the transverse plane. We compute various definitions of the eccentricity within the new approach, which are relevant for the interpretation of the elliptic flow. Our approach predicts breaking of the scaling of the eccentricity with the Glauber eccentricity at the level of about 30%.},
doi = {10.1103/PHYSREVC.75.034905},
journal = {Physical Review. C, Nuclear Physics},
number = 3,
volume = 75,
place = {United States},
year = {Thu Mar 15 00:00:00 EDT 2007},
month = {Thu Mar 15 00:00:00 EDT 2007}
}