Fermionic Collective Modes of an Anisotropic Quark-Gluon Plasma
نویسندگان
چکیده
Abstract We determine the fermionic collective modes of a quark-gluon plasma which is anisotropic in momentum space. We calculate the fermion self-energy in both the imaginaryand real-time formalisms and find that numerically and analytically (for two special cases) there are no unstable fermionic modes. In addition we demonstrate that in the hard-loop limit the Kubo-MartinSchwinger condition, which relates the off-diagonal components of the real-time fermion self-energy, holds even for the anisotropic, and therefore non-equilibrium, quark-gluon plasma considered here. The results obtained here set the stage for the calculation of the non-equilibrium photon production rate from an anisotropic quark-gluon plasma.
منابع مشابه
Collective Modes of an Anisotropic Quark - Gluon Plasma
We analyze the collective modes of high-temperature QCD in the case when there is an anisotropy in the momentum-space distribution function for the gluons. We perform a tensor decomposition of the gluon self-energy and solve the dispersion relations for both stable and unstable modes. Results are presented for a class of anisotropic distribution functions which can be obtained by stretching or ...
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