Spectral Properties of Quarks at Finite Temperature in Lattice QCD - High Energy Physics - LatticeReport as inadecuate




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Abstract: We analyze the quark spectral function above and below the criticaltemperature for deconfinement and at finite momentum in quenched lattice QCD.It is found that the temporal quark correlation function in the deconfinedphase near the critical temperature is well reproduced by a two-pole ansatz forthe spectral function. The bare quark mass and momentum dependences of thespectral function are analyzed with this ansatz. In the chiral limit we findthat even near the critical temperature the quark spectral function has twocollective modes corresponding to the normal and plasmino excitations in thehigh temperature T limit. The pole mass of these modes at zero momentum,which should be identified to be the thermal mass of the quark, isapproximately proportional to T in a rather wide range of T in the deconfinedphase.



Author: Masakiyo Kitazawa, Frithjof Karsch

Source: https://arxiv.org/







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