Quantum Corrections to Boltzmann Equations
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.
- Publication:
-
Strong and Electroweak Matter 2002
- Pub Date:
- June 2003
- DOI:
- arXiv:
- arXiv:hep-ph/0301158
- Bibcode:
- 2003sem..conf..417J
- Keywords:
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- High Energy Physics - Phenomenology
- E-Print:
- 5 pages, Latex, 1 eps figure. To appear in the proceedings of Strong and Electroweak Matter (SEWM 2002), Heidelberg, Germany, 2-5 Oct 2002