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arXiv · hep-ph/0301158

Quantum corrections to Boltzmann equations

A. Jakovac
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Abstract

Because of IR (pinch) singularities a resummation is necessary in non-equilibrium field theories, that can be performed by using Kadanoff--Baym equations. Taking Landau prescription correctly into account, Kadanoff--Baym equations reduce to Boltzmann equations only in a restricted kinematical range; in other cases a new equation (the former constraint equation) has to be considered. In relaxation time approximation this new equation results in the shifting and smearing of multiparticle thresholds.

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A. Jakovac. 2003-01-20. Quantum corrections to Boltzmann equations. https://doi.org/10.1142/9789812704498_0054

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