Darmstadt 2016 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 56: Heavy Ion Collision and QCD Phases XI

HK 56.1: Talk

Thursday, March 17, 2016, 16:30–16:45, S1/01 A01

Photons from partonic transport — •Moritz Greif — Goethe Universität Frankfurt

We investigate photon production processes in the quark-gluon plasma. Several photon production processes are included in the partonic cascade BAMPS (Boltzmann Approach to Multi-Parton Scatterings). BAMPS provides a microscopic tool to study expanding fireballs, employing a stochastic method to solve the relativistic 3+1d Boltzmann equation for quarks, gluons and photons. The partonic cascade is applicable over the whole evolution of the plasma, thus giving insights also about the early, off-equilibrium phase. Apart from Compton/annihilation scattering we include inelastic bremsstrahlung cross sections and obtain rates that are compatible with resummed pQCD including interference effects. This opens up a variety of possible studys. We show results for photon spectra from the quark-gluon plasma and investigate its role for the elliptic flow of photons. Especially the transfer of anisotropy from the flowing medium onto photons can be understood microscopically.