Napredna pretraga

Pregled bibliografske jedinice broj: 37999

Two mechanisms for the elimination of pinch singularities in out of equilibrium thermal field theories


Dadić, Ivan
Two mechanisms for the elimination of pinch singularities in out of equilibrium thermal field theories // Physical review D, 59 (1999), 12. (međunarodna recenzija, članak, znanstveni)


Naslov
Two mechanisms for the elimination of pinch singularities in out of equilibrium thermal field theories

Autori
Dadić, Ivan

Izvornik
Physical review D (0556-2821) 59 (1999), 12;

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
Pinching singularity; out of equilibrium; thermal field theory

Sažetak
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.

Izvorni jezik
Engleski

Znanstvena područja
Fizika



POVEZANOST RADA


Projekt / tema
00980102

Ustanove
Institut "Ruđer Bošković", Zagreb

Autor s matičnim brojem:
Ivan Dadić, (8846)

Časopis indeksira:


  • Current Contents Connect (CCC)
  • Web of Science Core Collection (WoSCC)
    • SCI-EXP, SSCI i/ili A&HCI


Uključenost u ostale bibliografske baze podataka:


  • AGRINDEX Humanities Index