Roman Pasechnik
Senior lecturer
Thermal Field Theory in real-time formalism : concepts and applications for particle decays
Author
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 - Has been reorganised
Publishing year
2021-02
Language
English
Publication/Series
European Physical Journal A
Volume
57
Issue
2
Links
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