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Title: Mode-coupling effects in anisotropic flow in heavy-ion collisions

Abstract

Higher-order anisotropic flows in heavy-ion collisions are affected by nonlinear mode coupling effects. It has been suggested that the associated nonlinear hydrodynamic response coefficients probe the transport properties and are largely insensitive to the spectrum of initial density fluctuations of the medium created in these collisions. To test this suggestion, we explore nonlinear mode coupling effects in event-by-event viscous fluid dynamics, using two different models for the fluctuating initial density profiles, and compare the nonlinear coupling coefficients between the initial eccentricity vectors before hydrodynamic expansion and the final flow vectors after the expansion. For several mode coupling coefficients we find significant sensitivity to the initial fluctuation spectrum. Finally, they all exhibit strong sensitivity to the specific shear viscosity at freeze-out, but only weak dependence on the shear viscosity during hydrodynamic evolution.

Authors:
 [1]; ORCiD logo [2];  [2]
  1. Harbin Inst. of Technology, Harbin (China); The Ohio State Univ., Columbus, OH (United States)
  2. The Ohio State Univ., Columbus, OH (United States)
Publication Date:
Research Org.:
The Ohio State Univ., Columbus, OH (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)
OSTI Identifier:
1604413
Alternate Identifier(s):
OSTI ID: 1256132
Grant/Contract Number:  
SC0004286
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review C
Additional Journal Information:
Journal Volume: 93; Journal Issue: 6; Journal ID: ISSN 2469-9985
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS

Citation Formats

Qian, Jing, Heinz, Ulrich, and Liu, Jia. Mode-coupling effects in anisotropic flow in heavy-ion collisions. United States: N. p., 2016. Web. doi:10.1103/PhysRevC.93.064901.
Qian, Jing, Heinz, Ulrich, & Liu, Jia. Mode-coupling effects in anisotropic flow in heavy-ion collisions. United States. doi:10.1103/PhysRevC.93.064901.
Qian, Jing, Heinz, Ulrich, and Liu, Jia. Mon . "Mode-coupling effects in anisotropic flow in heavy-ion collisions". United States. doi:10.1103/PhysRevC.93.064901. https://www.osti.gov/servlets/purl/1604413.
@article{osti_1604413,
title = {Mode-coupling effects in anisotropic flow in heavy-ion collisions},
author = {Qian, Jing and Heinz, Ulrich and Liu, Jia},
abstractNote = {Higher-order anisotropic flows in heavy-ion collisions are affected by nonlinear mode coupling effects. It has been suggested that the associated nonlinear hydrodynamic response coefficients probe the transport properties and are largely insensitive to the spectrum of initial density fluctuations of the medium created in these collisions. To test this suggestion, we explore nonlinear mode coupling effects in event-by-event viscous fluid dynamics, using two different models for the fluctuating initial density profiles, and compare the nonlinear coupling coefficients between the initial eccentricity vectors before hydrodynamic expansion and the final flow vectors after the expansion. For several mode coupling coefficients we find significant sensitivity to the initial fluctuation spectrum. Finally, they all exhibit strong sensitivity to the specific shear viscosity at freeze-out, but only weak dependence on the shear viscosity during hydrodynamic evolution.},
doi = {10.1103/PhysRevC.93.064901},
journal = {Physical Review C},
number = 6,
volume = 93,
place = {United States},
year = {2016},
month = {6}
}

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Cited by: 11 works
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Works referenced in this record:

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    Works referencing / citing this record: