Direct photon production from viscous quark-gluon plasma
نویسندگان
چکیده
منابع مشابه
Photon production from a quark-gluon plasma.
In-medium interactions of a particle in a hot plasma are considered in the framework of thermal field theory. The formalism to calculate gauge invariant rates for photon and dilepton production from the medium is given. In the application to a QED plasma, astrophysical consequences are pointed out. The photon production rate from strongly interacting quarks in the quark–gluon plasma, which migh...
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Photon or dilepton production by a hot plasma is expected to reflect rather cleanly the state of the system. Indeed, in the collision of two heavy nuclei, the typical size of the system is much smaller than the mean free path of particles that feel only the electromagnetic interactions, which enables photons and leptons to escape freely. However, it has been realized recently that those rates a...
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We calculate photon production from a quark-gluon plasma which is anisotropic in momentum space including the Compton scattering, q(q̄) g → q(q̄) γ, and annihilation, q q̄ → g γ, processes. We show that for a quark-gluon plasma which has an oblate momentum-space anisotropy, 〈p2L〉 < 〈p 2 T 〉, the photon production rate has an angular dependence which is peaked transverse to the beam line. We propos...
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We compute the photon emission rate of an equilibrated, hot QCD plasma at zero chemical potential, to leading order in both αEM and the QCD coupling gs(T ). This requires inclusion of near-collinear bremsstrahlung and inelastic pair annihilation contributions, and correct incorporation of LandauPomeranchuk-Migdal suppression effects for these processes. Analogous results for a QED plasma are al...
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We compute the photon production rate of a quark-gluon plasma (QGP) at finite quark chemical potential μ using the Braaten-Pisarski method, thus continuing the work of Kapusta, Lichard, and Seibert who did the calculation for μ = 0. The thermal production of hard photons in ultrarelativistic heavy ion collisions has been proposed as a possible signature for the formation of a quark-gluon plasma...
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ژورنال
عنوان ژورنال: Physical Review C
سال: 2011
ISSN: 0556-2813,1089-490X
DOI: 10.1103/physrevc.83.034905