Dilepton to photon ratio, a viscometer of QGP

Details Dilepton to photon ratio, a viscometer of QGP Dilepton to photon ratio, a viscometer of QGP

2012-01-03

arxiv.org/abs/1201.0569v1

Physics

Nuclear Physics

Nuclear Theory

7 pages, 7 figures

Scientific paper

In the Israel-Stewart's 2nd order hydrodynamics, a viscous effect on dilepton emission from a QGP medium is investigated. Dileptons are strongly affected by QGP viscosity. Large invariant mass dileptons, due to their lower velocity, are less affected by viscosity than the low invariant mass dileptons. We also show that the ratio of photon to dilepton is sensitive to the viscosity and can serve as a viscometer for QGP.

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