Effective dynamics of a non-Abelian plasma out of equilibrium

JERÓNIMO PERALTA RAMOS; ESTEBAN CALZETTA

PHYSICAL REVIEW D - PARTICLE AND FILDS

APS

Lugar: Ridge; Año: 2012 vol. 86 p. 1 - 17

0556-2821

Starting from kinetic theory, we obtain a nonlinear dissipative formalism describing the nonequilibriumevolution of scalar colored particles coupled self-consistently to non-Abelian classical gauge fields. Thelink between the one-particle distribution function of the kinetic description and the variables ofthe effective theory is determined by extremizing the entropy production. This method does not relyon the usual gradient expansion in fluid dynamic variables, and therefore the resulting effective theory canhandle situations where these gradients (and hence the momentum-space anisotropies) are expected to belarge. The formalism presented here, being computationally less demanding than kinetic theory, may beuseful as a simplified model of the dynamics of color fields during the early stages of heavy ion collisionsand in phenomena related to parton energy loss.