Eur. Phys. J. C (2005) 43: 375-380
https://doi.org/10.1140/epjc/s2005-02292-y

Theoretical Physics

Photon and dilepton production in the quark-gluon plasma: perturbation theory versus lattice QCD

¹ ECT*, Villa Tambosi, Strada delle Tabarelle 286, 38050, Villazzano (TN), Italy
² Service de Physique Théorique, CEA Saclay, 91191, Gif-sur-Yvette cedex, France

^* e-mail: blaizot@spht.saclay.cea.fr

Received: 18 April 2005
Published online: 22 June 2005

Abstract

This talk reviews the status of QCD calculations of photon and dilepton production rates in a quark-gluon plasma. Theses rates are known to order . Their calculations involve various resummations to account for well identified physical effects that are briefly described. Lattice calculations of the spectral functions give also access to the dilepton rates. Comparison with perturbative results points to inconsistencies in both approaches when the dilepton energy becomes small.