Ultrasoft amplitudes in hot QCD
نویسندگان
چکیده
منابع مشابه
Ultrasoft Amplitudes in Hot QCD
By using the Boltzmann equation describing the relaxation of colour excitations in the QCD plasma, we obtain effective amplitudes for the ultrasoft colour fields carrying momenta of order g2T . These amplitudes are of the same order in g as the hard thermal loops (HTL), which they generalize by including the effects of the collisions among the hard particles. The ultrasoft amplitudes share many...
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The effective amplitudes for gluon momenta p ≪ gT in hot QCD exhibit damping as a result of collisions. The whole set of n-point amplitudes is shown to be generated from one functional Kμν(X,Y ;A), in addition to the induced current jμ(X;A). PACS: 11.10.Wx, 12.38.Mh; keywords: quark-gluon plasma, effective theory The ultrasoft amplitudes are the effective amplitudes that are obtained in pure ga...
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We determine the quark damping rates in the context of next-to-leading order hard-thermal-loop summed perturbation of high-temperature QCD where weak coupling is assumed. The quarks are ultrasoft. Three types of divergent behavior are encountered: infrared, light-cone and at specific points determined by the gluon energies. The infrared divergence persists and is logarithmic whereas the two oth...
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ژورنال
عنوان ژورنال: Nuclear Physics B
سال: 2000
ISSN: 0550-3213
DOI: 10.1016/s0550-3213(99)00783-x