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

• URL: http://arxiv.org/abs/2007.01224v1
• Date: Thu, 2 Jul 2020 16:16:59 GMT
• Title: Thermal Field Theory in real-time formalism: concepts and applications for particle decays
• Authors: Torbj\"orn Lundberg and Roman Pasechnik
• Abstract summary: This review represents a detailed and comprehensive discussion of the Thermal Field Theory (TFT) concepts and key results in Yukawa-type theories. We present a compendium of thermal decay rates for several typical reactions calculated within the framework of the real-time formalism.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: 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.

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