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Effect of Confinement on Thermal Production and Elliptic Flow of Dileptons and Photons

ECT* Seminar

Daisuke Satow

12 Nov 2014 - 11:15
Villa Tambosi 2nd Floor, Seminar Room

Lattice simulation of quantum chromodynamics showed that, even above the transition temperature, the value of the Polyakov loop, which is approximate order parameter of confinement, is different from the perturbative value.This result suggested the importance of considering the effect of nontrivial value of the Polyakov loop effect, in analyzing the properties of quark-gluon plasma.We calculate the photon and the dilepton production rates in a model in which the effect of the nontrivial Polyakov loop is taken into account as a gluon condensate.As a result, we find that the photon production is suppressed compared with the calculation in which the Polyakov loop effect is neglected, while the dilepton production is slightly enhanced.We discuss a physical interpretation of these results.Furthermore, we briefly discuss how these modifications of the production rates change the v2, by using a simulation with hydrodynamics.