Hard gluon damping in hot QCD

Details Hard gluon damping in hot QCD Hard gluon damping in hot QCD

2004-03-20

arxiv.org/abs/hep-ph/0403225v1

Phys.Rev. D70 (2004) 034016

Physics

High Energy Physics

High Energy Physics - Phenomenology

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Scientific paper

10.1103/PhysRevD.70.034016

The gluon collisional width in hot QCD plasmas is discussed with emphasis on temperatures near $T_c$, where the coupling is large. Considering its effect on the entropy, which is known from lattice calculations, it is argued that the width, which in the perturbative limit is given by $\gamma \sim g^2 \ln(1/g) T$, should be sizeable at intermediate temperatures but has to be small close to $T_c$. Implications of these results for several phenomenologically relevant quantities, such as the energy loss of hard jets, are pointed out.

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