Stochastic behavior of effective field theories across the threshold
نویسندگان
چکیده
منابع مشابه
Stochastic Behavior of Effective Field Theories Across Threshold
We explore how the existence of a field with a heavy mass influences the low energy dynamics of a quantum field with a light mass by expounding the stochastic characters of their interactions which take on the form of fluctuations in the number of (heavy field) particles created at the threshold, and dissipation in the dynamics of the light fields, arising from the backreaction of produced heav...
متن کاملStochastic Behavior of E ective Field Theories Across Threshold
We explore how the existence of a eld with a heavy mass in uences the low energy dynamics of a quantum eld with a light mass by expounding the stochastic characters of their interactions which take on the form of uctuations in the number of (heavy eld) particles created at the threshold, and dissipation in the dynamics of the light elds, arising from the backreaction of produced heavy particles...
متن کاملEffective Field Theories
Three lectures in which I give an introduction to effective field theories in particle physics.
متن کاملEffective Field Theories
These lectures introduce some of the basic ideas of effective field theories. The topics discussed include: relevant and irrelevant operators and scaling, renormalization in effective field theories, decoupling of heavy particles, power counting, and naive dimensional analysis. Effective Lagrangians are used to study the ∆S = 2 weak interactions and chiral perturbation theory.
متن کاملEffective Field Theories
An effective field theory (EFT) of a physical system is a theory of the dynamics of the system at energies small compared to a given cutoff. For some systems, low-energy states with respect to this cutoff are effectively independent of ("decoupled from") states at high energies. Hence one may study the low-energy sector of the theory without the need for a detailed description of the high-energ...
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ژورنال
عنوان ژورنال: Physical Review D
سال: 1997
ISSN: 0556-2821,1089-4918
DOI: 10.1103/physrevd.55.3536