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Title: Knudsen number, ideal hydrodynamic limit for elliptic flow, and QGP viscosity in {radical}(s{sub NN})=62 and 200 GeV Cu+Cu/Au+Au collisions

Abstract

Taking into account entropy generation during evolution of a viscous fluid, we have estimated the inverse Knudsen number, the ideal hydrodynamic limit for elliptic flow, and the quark-gluon plasma viscosity to entropy ratio in {radical}(s{sub NN})=62 and 200 GeV Cu+Cu/Au+Au collisions. The viscosity to entropy ratio is estimated as {eta}/s=0.17{+-}0.10{+-}0.20, where the first error is statistical, the second one is systematic. In a central Au+Au collision, the inverse Knudsen number is {approx_equal}2.80{+-}1.63, which is presumably too small for complete equilibration. In peripheral collisions it is even less. The ideal hydrodynamic limit for elliptic flow is {approx}40% more than the experimental flow in a central collision.

Authors:
 [1]
  1. Variable Energy Cyclotron Centre, 1/AF, Bidhan Nagar, Kolkata 700 064 (India)
Publication Date:
OSTI Identifier:
21421330
Resource Type:
Journal Article
Journal Name:
Physical Review. C, Nuclear Physics
Additional Journal Information:
Journal Volume: 82; Journal Issue: 4; Other Information: DOI: 10.1103/PhysRevC.82.047901; (c) 2010 The American Physical Society; Journal ID: ISSN 0556-2813
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; ATOM-ATOM COLLISIONS; COPPER; ENTROPY; GEV RANGE; GOLD; HYDRODYNAMIC MODEL; KNUDSEN FLOW; PERIPHERAL COLLISIONS; QUARK MATTER; ATOM COLLISIONS; BASIC INTERACTIONS; COLLISIONS; ELEMENTS; ENERGY RANGE; FLUID FLOW; GAS FLOW; INTERACTIONS; MATHEMATICAL MODELS; MATTER; METALS; PARTICLE MODELS; PHYSICAL PROPERTIES; STATISTICAL MODELS; STRONG INTERACTIONS; THERMODYNAMIC MODEL; THERMODYNAMIC PROPERTIES; TRANSITION ELEMENTS

Citation Formats

Chaudhuri, A K. Knudsen number, ideal hydrodynamic limit for elliptic flow, and QGP viscosity in {radical}(s{sub NN})=62 and 200 GeV Cu+Cu/Au+Au collisions. United States: N. p., 2010. Web. doi:10.1103/PHYSREVC.82.047901.
Chaudhuri, A K. Knudsen number, ideal hydrodynamic limit for elliptic flow, and QGP viscosity in {radical}(s{sub NN})=62 and 200 GeV Cu+Cu/Au+Au collisions. United States. doi:10.1103/PHYSREVC.82.047901.
Chaudhuri, A K. Fri . "Knudsen number, ideal hydrodynamic limit for elliptic flow, and QGP viscosity in {radical}(s{sub NN})=62 and 200 GeV Cu+Cu/Au+Au collisions". United States. doi:10.1103/PHYSREVC.82.047901.
@article{osti_21421330,
title = {Knudsen number, ideal hydrodynamic limit for elliptic flow, and QGP viscosity in {radical}(s{sub NN})=62 and 200 GeV Cu+Cu/Au+Au collisions},
author = {Chaudhuri, A K},
abstractNote = {Taking into account entropy generation during evolution of a viscous fluid, we have estimated the inverse Knudsen number, the ideal hydrodynamic limit for elliptic flow, and the quark-gluon plasma viscosity to entropy ratio in {radical}(s{sub NN})=62 and 200 GeV Cu+Cu/Au+Au collisions. The viscosity to entropy ratio is estimated as {eta}/s=0.17{+-}0.10{+-}0.20, where the first error is statistical, the second one is systematic. In a central Au+Au collision, the inverse Knudsen number is {approx_equal}2.80{+-}1.63, which is presumably too small for complete equilibration. In peripheral collisions it is even less. The ideal hydrodynamic limit for elliptic flow is {approx}40% more than the experimental flow in a central collision.},
doi = {10.1103/PHYSREVC.82.047901},
journal = {Physical Review. C, Nuclear Physics},
issn = {0556-2813},
number = 4,
volume = 82,
place = {United States},
year = {2010},
month = {10}
}