Effective dynamics of a non-Abelian plasma out of equilibrium

被引:19
作者
Peralta-Ramos, J. [1 ]
Calzetta, E.
机构
[1] Univ Buenos Aires, Fac Ciencias Exactas & Nat, Dept Fis, RA-1428 Buenos Aires, DF, Argentina
来源
PHYSICAL REVIEW D | 2012年 / 86卷 / 12期
关键词
GLUON TRANSPORT-THEORY; HYDRODYNAMIC TRANSPORT; KINETIC-THEORY; GAUGE-FIELDS; EARLY-STAGE; CLOSURE; THERMALIZATION; PRINCIPLE; MODEL;
D O I
10.1103/PhysRevD.86.125024
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
Starting from kinetic theory, we obtain a nonlinear dissipative formalism describing the nonequilibrium evolution of scalar colored particles coupled self-consistently to non-Abelian classical gauge fields. The link between the one-particle distribution function of the kinetic description and the variables of the effective theory is determined by extremizing the entropy production. This method does not rely on the usual gradient expansion in fluid dynamic variables, and therefore the resulting effective theory can handle situations where these gradients (and hence the momentum-space anisotropies) are expected to be large. The formalism presented here, being computationally less demanding than kinetic theory, may be useful as a simplified model of the dynamics of color fields during the early stages of heavy ion collisions and in phenomena related to parton energy loss. DOI: 10.1103/PhysRevD.86.125024
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页数:17
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