Dilepton production as a measure of QGP thermalization time

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dc.creatorMartinez, Mauricio
dc.creatorStrickland, Michael
dc.date2008-04-16
dc.date.accessioned2026-07-07T11:49:54Z
dc.date.available2026-07-07T11:49:54Z
dc.descriptionWe 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 <p_T< 8 GeV is sensitive to the assumed isotropization time of the system, tau_iso. Therefore high-energy dilepton production can be used to probe the degree of momentum-space isotropy of a quark-gluon plasma produced in relativistic heavy ion collisions and the time of onset of hydrodynamic expansion of the QGP.
dc.description4 pages, 3 figures, talk given at the 20th International Conference on Ultrarelativistic Nucleus-Nucleus Collisions: Quark Matter 2008 (QM 2008), Jaipur, India, 4-10 Feb 2008
dc.identifierhttps://arxiv.org/abs/0804.2618
dc.identifierhttp://arxiv.org/abs/0804.2618
dc.identifierJ.Phys.G35:104162,2008
dc.identifierdoi:10.1088/0954-3899/35/10/104162
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/203402
dc.subjectHigh Energy Physics - Phenomenology
dc.titleDilepton production as a measure of QGP thermalization time
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