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Title: Reaction plane angle dependence of dihadron azimuthal correlations from a multiphase transport model calculation

Abstract

Dihadron azimuthal angle correlations relative to the reaction plane have been investigated in Au+Au collisions at {radical}(s{sub NN})=200 GeV using a multiphase transport model (AMPT). Such reaction plane azimuthal-angle-dependent correlations can shed light on the path-length effect of energy loss of high-transverse-momentum particles propagating through a hot dense medium. The correlations vary with the trigger particle azimuthal angle with respect to the reaction plane direction, {phi}{sub s}={phi}{sub T}-{psi}{sub EP}, which is consistent with the experimental observation by the STAR Collaboration. The dihadron azimuthal angle correlation functions on the away side of the trigger particle present a distinct evolution from a single-peak to a broad, possibly double-peak structure when the trigger particle direction goes from in-plane to out-of-plane with the reaction plane. The away-side angular correlation functions are asymmetric with respect to the back-to-back direction in some regions of {phi}{sub s}, which could provide insight into the testing v{sub 1} method for reconstructing the reaction plane. In addition, both the root-mean-square width (W{sub rms}) of the away-side correlation distribution and the splitting parameter (D) between the away-side double peaks increase slightly with {phi}{sub s}, and the average transverse momentum of away-side-associated hadrons shows a strong {phi}{sub s} dependence. Our results indicatemore » that a strong parton cascade and resultant energy loss could play an important role in the appearance of a double-peak structure in the dihadron azimuthal angular correlation function on the away side of the trigger particle.« less

Authors:
;  [1]; ; ; ; ;  [1];  [2]
  1. Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Post Office Box 800-204, Shanghai 201800 (China)
  2. Department of Physics and Astronomy, University of California, Los Angeles, Los Angeles, California 90095 (United States)
Publication Date:
OSTI Identifier:
21296621
Resource Type:
Journal Article
Journal Name:
Physical Review. C, Nuclear Physics
Additional Journal Information:
Journal Volume: 80; Journal Issue: 6; Other Information: DOI: 10.1103/PhysRevC.80.064913; (c) 2009 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0556-2813
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; ANGULAR CORRELATION; ASYMMETRY; ATOM-ATOM COLLISIONS; CORRELATION FUNCTIONS; DISTRIBUTION; ENERGY LOSSES; GEV RANGE 100-1000; GOLD; HADRONS; TESTING; TRANSPORT THEORY; TRANSVERSE MOMENTUM

Citation Formats

Li, W, Zhang, S, Graduate School of the Chinese Academy of Sciences, Beijing 100080, Ma, Y G, Cai, X Z, Chen, J H, Ma, G L, Zhong, C, and Huang, H Z. Reaction plane angle dependence of dihadron azimuthal correlations from a multiphase transport model calculation. United States: N. p., 2009. Web. doi:10.1103/PHYSREVC.80.064913.
Li, W, Zhang, S, Graduate School of the Chinese Academy of Sciences, Beijing 100080, Ma, Y G, Cai, X Z, Chen, J H, Ma, G L, Zhong, C, & Huang, H Z. Reaction plane angle dependence of dihadron azimuthal correlations from a multiphase transport model calculation. United States. https://doi.org/10.1103/PHYSREVC.80.064913
Li, W, Zhang, S, Graduate School of the Chinese Academy of Sciences, Beijing 100080, Ma, Y G, Cai, X Z, Chen, J H, Ma, G L, Zhong, C, and Huang, H Z. Tue . "Reaction plane angle dependence of dihadron azimuthal correlations from a multiphase transport model calculation". United States. https://doi.org/10.1103/PHYSREVC.80.064913.
@article{osti_21296621,
title = {Reaction plane angle dependence of dihadron azimuthal correlations from a multiphase transport model calculation},
author = {Li, W and Zhang, S and Graduate School of the Chinese Academy of Sciences, Beijing 100080 and Ma, Y G and Cai, X Z and Chen, J H and Ma, G L and Zhong, C and Huang, H Z},
abstractNote = {Dihadron azimuthal angle correlations relative to the reaction plane have been investigated in Au+Au collisions at {radical}(s{sub NN})=200 GeV using a multiphase transport model (AMPT). Such reaction plane azimuthal-angle-dependent correlations can shed light on the path-length effect of energy loss of high-transverse-momentum particles propagating through a hot dense medium. The correlations vary with the trigger particle azimuthal angle with respect to the reaction plane direction, {phi}{sub s}={phi}{sub T}-{psi}{sub EP}, which is consistent with the experimental observation by the STAR Collaboration. The dihadron azimuthal angle correlation functions on the away side of the trigger particle present a distinct evolution from a single-peak to a broad, possibly double-peak structure when the trigger particle direction goes from in-plane to out-of-plane with the reaction plane. The away-side angular correlation functions are asymmetric with respect to the back-to-back direction in some regions of {phi}{sub s}, which could provide insight into the testing v{sub 1} method for reconstructing the reaction plane. In addition, both the root-mean-square width (W{sub rms}) of the away-side correlation distribution and the splitting parameter (D) between the away-side double peaks increase slightly with {phi}{sub s}, and the average transverse momentum of away-side-associated hadrons shows a strong {phi}{sub s} dependence. Our results indicate that a strong parton cascade and resultant energy loss could play an important role in the appearance of a double-peak structure in the dihadron azimuthal angular correlation function on the away side of the trigger particle.},
doi = {10.1103/PHYSREVC.80.064913},
url = {https://www.osti.gov/biblio/21296621}, journal = {Physical Review. C, Nuclear Physics},
issn = {0556-2813},
number = 6,
volume = 80,
place = {United States},
year = {2009},
month = {12}
}