Bulk viscosity effects in event-by-event relativistic hydrodynamics

被引：153
|
作者：
Noronha-Hostler, Jacquelyn [1 ]
Denicol, Gabriel S. [2 ]
Noronha, Jorge [1 ]
Andrade, Rone P. G. [1 ]
Grassi, Frederique [1 ]
机构：
[1] Univ Sao Paulo, Inst Fis, BR-05315970 Sao Paulo, Brazil
[2] McGill Univ, Dept Phys, Montreal, PQ H3A 2T8, Canada
来源：
PHYSICAL REVIEW C | 2013年 / 88卷 / 04期
基金：
巴西圣保罗研究基金会; 加拿大自然科学与工程研究理事会;
关键词：
SMOOTHED PARTICLE HYDRODYNAMICS; QUARK-GLUON PLASMA; MATTER; FLOW;
D O I：
10.1103/PhysRevC.88.044916
中图分类号：
O57 [原子核物理学、高能物理学];
学科分类号：
070202 ;
摘要：
Bulk viscosity effects on the collective flow harmonics in heavy-ion collisions are investigated, on an event-by-event basis, using a newly developed 2 + 1 Lagrangian hydrodynamic code named V-USPHYDRO, which implements the smoothed particle hydrodynamics algorithm for viscous hydrodynamics. A new formula for the bulk viscous corrections present in the distribution function at freeze-out is derived, starting from the Boltzmann equation for multi-hadron species. Bulk viscosity is shown to enhance the collective flow Fourier coefficients from v(2)(p(T)) to v(5)(p(T)) when p(T) similar to 1-2.5 GeV, even when the bulk viscosity to entropy density ratio, zeta/s, is significantly smaller than 1/(4 pi).
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收藏
页数：17
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