Dilepton production from a viscous QGP
| dc.creator | Dusling, Kevin | |
| dc.creator | Lin, Shu | |
| dc.date | 2008-03-08 | |
| dc.date | 2008-04-15 | |
| dc.date.accessioned | 2026-07-07T11:48:57Z | |
| dc.date.available | 2026-07-07T11:48:57Z | |
| dc.description | This work calculates the first correction to the leading order qq dilepton production rates due to shear viscosity in an expanding gas. The modified rates are integrated over the space-time history of a viscous hydrodynamic simulation of RHIC collisions. The net result is a {\em hardening} of $q_\perp$ spectrum with the magnitude of the correction increasing with invariant mass. We argue that a thermal description is reliable for invariant masses less than $M_{max}\approx(2τ_0 T_0^2)/(η/s)$. For reasonable values of the shear viscosity and thermalization time $M_{max}\approx 4.5$ GeV. Finally, the early emission from a viscous medium is compared to emission from a longitudinally free streaming plasma. Qualitative differences in $q_\perp$ spectrum are seen which could be used to extract information on the thermalization time, viscosity to entropy ratio and possibly the thermalization mechanism in heavy-ion collisions. | |
| dc.description | 17 pages, 8 figures | |
| dc.identifier | https://arxiv.org/abs/0803.1262 | |
| dc.identifier | http://arxiv.org/abs/0803.1262 | |
| dc.identifier | Nucl.Phys.A809:246-258,2008 | |
| dc.identifier | doi:10.1016/j.nuclphysa.2008.06.007 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/203069 | |
| dc.subject | Nuclear Theory | |
| dc.title | Dilepton production from a viscous QGP | |
| dc.type | text |