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Semiclassical methods in finite temperature field theory

Thesis/Dissertation ·
OSTI ID:5163643
We study some semiclassical methods and non-perturbative phenomena in finite temperature field theory. A discussion of theoretical concepts used to study quantum tunneling in systems with many degrees of freedom is given. A semiclassical approximation for the probability distribution function rho(phi) = in field theory is presented and is shown to yield the exact distribution functions for a free scalar field theory and a pure Abelian gauge theory. A Hartree self-consistent field approximation for the distribution function is also discussed. Quantitative calculations of baryon and lepton number violation by electroweak instantons at zero and finite temperature are reported.
Research Organization:
Illinois Univ., Urbana (USA)
OSTI ID:
5163643
Country of Publication:
United States
Language:
English

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Related Subjects

645400* -- High Energy Physics-- Field Theory
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BARYONS
CONSERVATION LAWS
DISTRIBUTION FUNCTIONS
ELEMENTARY PARTICLES
FERMIONS
FIELD THEORIES
FUNCTIONS
HADRONS
INSTANTONS
LEPTONS
QUANTUM FIELD THEORY
QUASI PARTICLES
SEMICLASSICAL APPROXIMATION
TUNNEL EFFECT