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Title: Anisotropic parton escape is the dominant source of azimuthal anisotropy in transport models

We trace the development of azimuthal anisotropy (vn, n = 2, 3) via parton-parton collision history in two transport models. The parton vn is studied as a function of the number of collisions of each parton in Au+Au and d+Au collisions at √ sNN = 200 GeV. Findings show that the majority of vn comes from the anisotropic escape probability of partons, with no fundamental difference at low and high transverse momenta. The contribution to vn from hydrodynamic-type collective flow is found to be small. Only when the parton-parton cross-section is set unrealistically large does this contribution start to take over. Our findings challenge the current paradigm emerged from hydrodynamic comparisons to anisotropy data.
Authors:
 [1] ;  [2] ;  [3] ;  [4] ;  [1] ;  [5]
  1. Purdue Univ., West Lafayette, IN (United States). Dept. of Physics and Astronomy
  2. Univ. of Florida, Gainesville, FL (United States). Department of Physics
  3. East Carolina Univ., Greenville, NC (United States). Department of Physics
  4. Central China Normal Univ., (China). Key Laboratory of Quark & Lepton Physics
  5. Purdue Univ., West Lafayette, IN (United States). Dept. of Physics and Astronomy; Central China Normal Univ., (China). Key Laboratory of Quark & Lepton Physics
Publication Date:
Grant/Contract Number:
FG02-88ER40412; FG02-13ER16413
Type:
Published Article
Journal Name:
Physics Letters. Section B
Additional Journal Information:
Journal Volume: 753; Journal ID: ISSN 0370-2693
Publisher:
Elsevier
Research Org:
Purdue Univ., West Lafayette, IN (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; quark-gluon plasma; anisotropic flow; transport model; hydrodynamics
OSTI Identifier:
1234183
Alternate Identifier(s):
OSTI ID: 1242352