Bochum 2018 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 2: Heavy Ion Collisions and QCD Phases I
HK 2.2: Vortrag
Montag, 26. Februar 2018, 14:30–14:45, HZO 60
Benchmark of microscopic hadronic direct photon emission in thermal equilibrium — •Anna Schäfer1,2, Jonas Rothermel1,2, Juan M. Torres-Rincon3, Niklas Ehlert2, Charles Gale4, and Hannah Petersen1,2,5 — 1Frankfurt Institute for Advanced Studies, D-60438 Frankfurt am Main, Germany — 2Institut für Theoretische Physik, Goethe-Universität, D-60438 Frankfurt am Main, Germany — 3Department of Physics and Astronomy, Stony Brook University, US-11794 Stony Brook, USA — 4Department of Physics, McGill University, CA-H3A 2T8 Montreal, Canada — 5GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany
Cross sections for direct photon production in hadronic scattering processes have been calculated according to an effective chiral field theory following Turbide et al. For π + ρ → π + γ and π + π → ρ + γ processes, these cross sections have been implemented into a novel hadronic transport approach (SMASH), which is suitable for collisions at low and intermediate energies. Comparisons of the obtained thermal rates in infinite matter calculations to theoretical predictions and to the ones used in hydrodynamic calculations are shown. This constitutes a benchmark for future non-equilibrium calculations. Employing SMASH for the final state rescattering in a hybrid approach will allow to assess the importance of the hadronic stage in the generation of direct photon flow.