PRODUCTION OF THERMAL PHOTONS IN VISCOUS FLUID DYNAMICS WITH TEMPERATURE-DEPENDENT SHEAR VISCOSITY

J. PERALTA-RAMOS; M. S. NAKWACKI

Buenos Aires

Otro; PASI 2012 Exploring the terascale and beyond; 2012

We compute the spectrum of thermal photons created inAu+Au collisions at \sqrt(sNN) = 200 GeV, taking into accountdissipative corrections in production processes correspondingto the quark–gluon plasma and hadronic phases. Todescribe the evolution of the fireball we use a viscousfluid dynamic model with different parametrizations for thetemperature–dependence of eta/s. We find that the spectrumsignificantly depends on the values of eta/s in theQGP phase, and is almost insensitive to the values in thehadronic phase. We also compare the influence of thetemperature–dependence of eta/s on the spectrum of thermalphotons to that of using different equations of state inthe fluid dynamic simulations, finding that both effects areof the same order of magnitude.