Gießen 2007 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 19: Physik mit schweren Ionen
HK 19.5: Vortrag
Dienstag, 13. März 2007, 18:00–18:15, F
Dilepton production from an anisotropic quark gluon plasma — Adrian Dumitru1, Michael Strickland2, and •Mauricio Martinez3 — 1Institut für Theoretische Physik, Johann Wolfgang Goethe Universität, Frankfurt am Main, Germany — 2Frankfurt Institute for Advanced Studies, Johann Wolfgang Goethe Universität, Frankfurt am Main, Germany — 3Helmholtz Research School, Johann Wolfgang Goethe Universität, Frankfurt am Main, Germany
We calculate the leading-order dilepton production resulting from the annihilation process qq → l+ l− assuming a quark-gluon plasma which is anisotropic in momentum space. Such momentum-space anisotropies are generated by the rapid longitudinal expansion of the initial pre-hadronic fireball. Although hydrodynamic models assume fast isotropization, there is currently no independent way to determine the level of anisotropy experimentally. Due to their weak interaction with the surrounding matter electromagnetic observables, such as dilepton production provide an ideal tool for determining such information.