Photon production from non-equilibrium QGP in heavy ion collisions

We present a calculation of thermal photon production, i.e. photons from secondary interactions among particles produced in heavy ion collisions at collider energies. This is done within the framework of hydrodynamics. We take into account the lack of chemical equilibrium in QGP. It turns out that the main effects from the chemical non-equilibrium composition of QGP, reduction of particle number and increase in temperature, nearly cancel in the photon spectrum.

[1]  D. Srivastava,et al.  The electromagnetic signature of jets , 2004, nucl-th/0403054.

[2]  D. K. Srivastava,et al.  Photon physics in heavy ion collisions at the LHC , 2003, hep-ph/0311131.

[3]  D. K. Srivastava,et al.  High-energy photons from passage of jets through Quark-Gluon plasma. , 2002, Physical review letters.

[4]  F. Gelis,et al.  Landau-Pomeranchuk-Migdal resummation for dilepton production , 2002, hep-ph/0211036.

[5]  K. Eskola,et al.  Dependence of hadron spectra on decoupling temperature and resonance contributions , 2002, hep-ph/0206230.

[6]  L. Yaffe,et al.  Photon emission from quark-gluon plasma: complete leading order results , 2001, hep-ph/0111107.

[7]  K. Tuominen,et al.  Scaling of transverse energies and multiplicities with atomic number and energy in ultrarelativistic nuclear collisions , 1999, hep-ph/9909456.

[8]  D. Rischke,et al.  Chemical equilibration of quarks and gluons at RHIC and LHC energies , 1999, nucl-th/9908004.

[9]  D. Srivastava,et al.  Expanding quark - gluon plasmas: Transverse flow, chemical equilibration and electromagnetic radiation , 1996, nucl-th/9611041.

[10]  Kapusta,et al.  Erratum: Parametrization of thermal photon emission rates from mesonic matter , 1993, Physical review. C, Nuclear physics.

[11]  Seibert,et al.  Erratum: High-energy photons from quark-gluon plasma versus hot hadronic gas , 1993, Physical review. D, Particles and fields.

[12]  Biró,et al.  Parton equilibration in relativistic heavy ion collisions. , 1993, Physical review. C, Nuclear physics.

[13]  Brown,et al.  Photon production through A1 resonance in high-energy heavy-ion collisions. , 1992, Physical review. D, Particles and fields.

[14]  Kapusta,et al.  Parametrization of thermal photon emission rates from mesonic matter. , 1992, Physical review. C, Nuclear physics.

[15]  Seibert,et al.  High-energy photons from quark-gluon plasma versus hot hadronic gas. , 1991, Physical review. D, Particles and fields.