A hydrodynamic approach to boost invariant free streaming

ESTEBAN CALZETTA

PHYSICAL REVIEW D - PARTICLE AND FILDS

APS

Lugar: Ridge; Año: 2015 vol. 92

0556-2821

We consider a family of exact boost invariant solutions of the transport equation for free streamingmassless particles, where the one particle distribution function is dened in terms of a function ofa single variable. The evolution of second and third moments of the one particle distributionfunction (the second moment being the energy momentum tensor (EMT) and the third moment thenon equilibrium current (NEC)) depends only on two moments of that function. Given those twomoments we show how to build a non linear hydrodynamic theory which reproduces the early timeevolution of the EMT and the NEC. The structure of these theories may give insight on nonlinearhydrodynamic phenomena on short time scales.