Speaker
Shu Lin
(RIKEN BNL)
Description
Experimental measurements of photon collective flow have obtained v2 comparable to those of hadrons. This favors a scenario of hadron dominated medium in photon production. A realistic calculation of photon rate in QGP phase is important to scrutinize this scenario. Fire ball produced in RHIC and LHC is close to semi-QGP which has a non-trivial value of Polyakov loop. We calculated the photon rate in the semi-QGP and found indeed a suppression of the photon rate due to non-trivial Polyakov loop, as compared to standard thermal perturbative results. We also calculated dilepton rate in the same semi-QGP. On the contrary, we found non-trivial Polyakov loop enhances the dilepton rate. This implies the v2 of dilepton distinguishes from that of photon.
| On behalf of collaboration: | None |
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Authors
Daisuke Satow
(RIKEN BNL)
Rob Pisarski
(Brookhaven National Laboratory)
Shu Lin
(RIKEN BNL)
