@article{
 title = {Nonequilibrium photon production in partonic transport simulations},
 type = {article},
 year = {2017},
 identifiers = {[object Object]},
 pages = {054903},
 volume = {95},
 websites = {http://link.aps.org/doi/10.1103/PhysRevC.95.054903},
 month = {5},
 day = {8},
 id = {8da90d43-4c93-3a76-8f0a-659be3ccca1d},
 created = {2019-09-19T08:06:26.175Z},
 accessed = {2019-09-19},
 file_attached = {true},
 profile_id = {ec892d6a-5397-38c7-8ff7-87d2774ed774},
 last_modified = {2019-09-19T08:06:27.608Z},
 tags = {BAMPS},
 read = {false},
 starred = {false},
 authored = {true},
 confirmed = {true},
 hidden = {false},
 citation_key = {Greif2017e},
 private_publication = {false},
 abstract = {© 2017 American Physical Society. We discuss the implementation of leading-order photon production in nonequilibrium partonic transport simulations. In this framework photons are produced by microscopic scatterings, where we include the exact matrix elements of Compton scattering, quark-antiquark annihilation, and bremsstrahlung processes. We show how the hard-thermal loop inspired screening of propagators has to be modified such that the microscopic production rate agrees well with the analytically known resummed leading-order rate. We model the complete quark-gluon plasma phase of heavy-ion collisions by using the partonic transport approach called the Boltzmann approach to multiparton scatterings (BAMPS), which solves the ultrarelativistic Boltzmann equation with Monte Carlo methods. We show photon spectra and elliptic flow of photons from BAMPS and discuss nonequilibrium effects. Due to the slow quark chemical equilibration in BAMPS, the yield is lower than the results from other groups; in turn we see a strong effect from scatterings of energetic jet-like partons with the medium. This nonequilibrium photon production can dominate the thermal emission, such that the spectra are harder and the photonic elliptic flow of the quark-gluon plasma becomes negative.},
 bibtype = {article},
 author = {Greif, Moritz and Senzel, Florian and Kremer, Heiner and Zhou, Kai and Greiner, Carsten and Xu, Zhe},
 journal = {Physical Review C},
 number = {5}
}

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We discuss the implementation of leading-order photon production in nonequilibrium partonic transport simulations. In this framework photons are produced by microscopic scatterings, where we include the exact matrix elements of Compton scattering, quark-antiquark annihilation, and bremsstrahlung processes. We show how the hard-thermal loop inspired screening of propagators has to be modified such that the microscopic production rate agrees well with the analytically known resummed leading-order rate. We model the complete quark-gluon plasma phase of heavy-ion collisions by using the partonic transport approach called the Boltzmann approach to multiparton scatterings (BAMPS), which solves the ultrarelativistic Boltzmann equation with Monte Carlo methods. We show photon spectra and elliptic flow of photons from BAMPS and discuss nonequilibrium effects. Due to the slow quark chemical equilibration in BAMPS, the yield is lower than the results from other groups; in turn we see a strong effect from scatterings of energetic jet-like partons with the medium. This nonequilibrium photon production can dominate the thermal emission, such that the spectra are harder and the photonic elliptic flow of the quark-gluon plasma becomes negative.","bibtype":"article","author":"Greif, Moritz and Senzel, Florian and Kremer, Heiner and Zhou, Kai and Greiner, Carsten and Xu, Zhe","journal":"Physical Review C","number":"5","bibtex":"@article{\n title = {Nonequilibrium photon production in partonic transport simulations},\n type = {article},\n year = {2017},\n identifiers = {[object Object]},\n pages = {054903},\n volume = {95},\n websites = {http://link.aps.org/doi/10.1103/PhysRevC.95.054903},\n month = {5},\n day = {8},\n id = {8da90d43-4c93-3a76-8f0a-659be3ccca1d},\n created = {2019-09-19T08:06:26.175Z},\n accessed = {2019-09-19},\n file_attached = {true},\n profile_id = {ec892d6a-5397-38c7-8ff7-87d2774ed774},\n last_modified = {2019-09-19T08:06:27.608Z},\n tags = {BAMPS},\n read = {false},\n starred = {false},\n authored = {true},\n confirmed = {true},\n hidden = {false},\n citation_key = {Greif2017e},\n private_publication = {false},\n abstract = {© 2017 American Physical Society. 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Due to the slow quark chemical equilibration in BAMPS, the yield is lower than the results from other groups; in turn we see a strong effect from scatterings of energetic jet-like partons with the medium. 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