Suppression of forward dilepton production from an anisotropic quark-gluon plasma - High Energy Physics - PhenomenologyReport as inadecuate




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Abstract: We calculate the rapidity dependence of leading-order medium dilepton yieldsresulting from a quark-gluon plasma which has a local time-dependent anisotropyin momentum space. We present a phenomenological model which includes temporalevolution of the plasma anisotropy parameter, xi, and the hard momentum scale,p hard. Our model interpolates between 1+1 dimensional collisionally-broadenedexpansion at early times and 1+1 dimensional ideal hydrodynamic expansion atlate times. Using our model, we find that at LHC energies, forward high-energymedium dilepton production would be suppressed by up to a factor of 3 if oneassumes an isotropization-thermalization time of 2 fm-c. Therefore, it may bepossible to use forward dilepton yields to experimentally determine the time ofonset of locally isotropic hydrodynamic expansion of the quark-gluon plasma asproduced in ultrarelativistic heavy-ion collisions.



Author: Mauricio Martinez, Michael Strickland

Source: https://arxiv.org/







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