Phases of QCD, Thermal Quasiparticles and Dilepton Radiation from a Fireball

Details Phases of QCD, Thermal Quasiparticles and Dilepton Radiation from a Fireball Phases of QCD, Thermal Quasiparticles and Dilepton Radiation from a Fireball

2002-01-08

arxiv.org/abs/hep-ph/0201048v3

Phys.Rev. C66 (2002) 014902

Physics

High Energy Physics

High Energy Physics - Phenomenology

31 pages, 15 figures, final version

Scientific paper

10.1103/PhysRevC.66.014902

We calculate dilepton production rates from a fireball adapted to the kinematical conditions realized in ultrarelativistic heavy ion collisions over a broad range of beam energies. The freeze-out state of the fireball is fixed by hadronic observables. We use this information combined with the initial geometry of the collision region to follow the space-time evolution of the fireball. Assuming entropy conservation, its bulk thermodynamic properties can then be uniquely obtained once the equation of state (EoS) is specified. The high-temperature (QGP) phase is modelled by a non-perturbative quasiparticle model that incorporates a phenomenological confinement description, adapted to lattice QCD results. For the hadronic phase, we interpolate the EoS into the region where a resonance gas approach seems applicable, keeping track of a possible overpopulation of the pion phase space. In this way, the fireball evolution is specified without reference to dilepton data, thus eliminating it as an adjustable parameter in the rate calculations. Dilepton emission in the QGP phase is then calculated within the quasiparticle model. In the hadronic phase, both temperature and finite baryon density effects on the photon spectral function are incorporated. Existing dilepton data from CERES at 158 and 40 AGeV Pb-Au collisions are well described, and a prediction for the PHENIX setup at RHIC for sqrt(s) = 200 AGeV is given.

Affiliated with

Also associated with

No associations

Rating

Phases of QCD, Thermal Quasiparticles and Dilepton Radiation from a Fireball does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Phases of QCD, Thermal Quasiparticles and Dilepton Radiation from a Fireball, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Phases of QCD, Thermal Quasiparticles and Dilepton Radiation from a Fireball will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-321716