Dilepton production as a measure of QGP thermalization time

Details Dilepton production as a measure of QGP thermalization time Dilepton production as a measure of QGP thermalization time

2008-04-16

arxiv.org/abs/0804.2618v1

J.Phys.G35:104162,2008

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 pages, 3 figures, talk given at the 20th International Conference on Ultrarelativistic Nucleus-Nucleus Collisions: Quark Mat

Scientific paper

10.1088/0954-3899/35/10/104162

We discuss dilepton production from a quark-gluon plasma which has a time-dependent anisotropy in momentum space. A phenomenological model for the hard momentum scale, p_hard(tau) and the plasma anisotropy parameter, xi(tau), is presented. The model interpolates between early-time 1+1 free streaming behavior (tau << tau_iso) and late-time ideal 1+1 hydrodynamical behavior (tau >> tau_iso). Using this model, we find that the dilepton rate arising from electromagnetic annihilations of quarks in the kinematic range 3

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