Two mechanisms for the elimination of pinch singularities in out of equilibrium thermal field theories
| dc.creator | Dadic, I. | |
| dc.date | 1998-01-23 | |
| dc.date | 1999-03-17 | |
| dc.date.accessioned | 2026-07-07T12:03:23Z | |
| dc.date.available | 2026-07-07T12:03:23Z | |
| dc.description | We analyze ill-defined pinch singularities characteristic of out of equilibrium thermal field theories. We identify two mechanisms that eliminate pinching even at the single self-energy insertion approximation to the propagator: the first is based on the vanishing of phase space at the singular point (threshold effect). It is effective in QED with a massive electron and a massless photon. In massless QCD, this mechanism fails, but the pinches cancel owing to the second mechanism, i.e., owing to the spinor/tensor structure of the single self-energy insertion contribution to the propagator. The constraints imposed on distribution functions are very reasonable. | |
| dc.description | 24 pages, Latex, no figures, revised version, many minor changes and corrections | |
| dc.identifier | https://arxiv.org/abs/hep-ph/9801399 | |
| dc.identifier | http://arxiv.org/abs/hep-ph/9801399 | |
| dc.identifier | Phys.Rev.D59:125012,1999 | |
| dc.identifier | doi:10.1103/PhysRevD.59.125012 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/207766 | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.title | Two mechanisms for the elimination of pinch singularities in out of equilibrium thermal field theories | |
| dc.type | text |