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Roman Pasechnik

Senior lecturer

Typical working day..

Thermal Field Theory in real-time formalism : concepts and applications for particle decays

Author

  • Torbjörn Lundberg
  • Roman Pasechnik

Summary, in English

This review represents a detailed and comprehensive discussion of the Thermal Field Theory (TFT) concepts and key results in Yukawa-type theories. We start with a general pedagogical introduction into the TFT in the imaginary- and real-time formulation. As phenomenologically relevant implications, we present a compendium of thermal decay rates for several typical reactions calculated within the framework of the real-time formalism and compared to the imaginary-time results found in the literature. Processes considered here are those of a neutral (pseudo)scalar decaying into two distinct (pseudo)scalars or into a fermion-antifermion pair. These processes are extended from earlier works to include chemical potentials and distinct species in the final state. In addition, a (pseudo)scalar emission off a fermion line is also discussed. These results demonstrate the importance of thermal effects in particle decay observables relevant in many phenomenological applications in systems at high temperatures and densities.

Department/s

  • Theoretical Particle Physics

Publishing year

2021-02

Language

English

Publication/Series

European Physical Journal A

Volume

57

Issue

2

Document type

Journal article review

Publisher

Springer

Topic

  • Subatomic Physics

Keywords

  • finite
  • temperature
  • effect
  • decay
  • rate
  • real
  • imaginary
  • time
  • formalism
  • real-time
  • imaginary-time
  • two-body
  • neutral
  • pseudoscalar
  • scalar
  • charge
  • spin-1/2
  • fermions
  • thermal
  • quantum
  • field
  • theory
  • equilibrium
  • ändlig
  • temperatur
  • effect
  • sönderfall
  • sönderfallshastighet
  • reell
  • imaginär
  • tid
  • formalism
  • reelltid
  • imaginärtid
  • tvåkropp
  • neutral
  • pseudoskalär
  • skalär
  • laddning
  • spin-1/2
  • fermioner
  • termisk
  • kvantum
  • kvantfältteori
  • fält
  • teori
  • jämvikt

Status

Published

ISBN/ISSN/Other

  • ISSN: 1434-6001