Structural aspects of Lorentz-violating quantum field theory
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Fecha
2018-02
Autores
Profesor/a Guía
Facultad/escuela
Idioma
en
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Institute of Physics Publishing
Nombre de Curso
Licencia CC
Licencia CC
Resumen
In the last couple of decades the Standard Model Extension has emerged as a fruitful framework to analyze the empirical and theoretical extent of the validity of cornerstones of modern particle physics, namely, of Special Relativity and of the discrete symmetries C, P and T (or some combinations of these). The Standard Model Extension allows to contrast high-precision experimental tests with posited alterations representing minute Lorentz and/or CPT violations. To date no violation of these symmetry principles has been observed in experiments, mostly prompted by the Standard-Model Extension. From the latter, bounds on the extent of departures from Lorentz and CPT symmetries can be obtained with ever increasing accuracy. These analyses have been mostly focused on tree-level processes. In this presentation I would like to comment on structural aspects of perturbative Lorentz violating quantum field theory. I will show that some insight coming from radiative corrections demands a careful reassessment of perturbation theory. Specifically I will argue that both the standard renormalization procedure as well as the Lehmann-Symanzik-Zimmermann reduction formalism need to be adapted given that the asymptotic single-particle states can receive quantum corrections from Lorentz-violating operators that are not present in the original Lagrangian. © Published under licence by IOP Publishing Ltd.
Notas
Indexación: Scopus.
International Workshop on CPT and Lorentz Symmetry in Field Theory 2017; Universidade do AlgarveFaro; Portugal; 6 July 2017 through 7 July 2017; Code 135301
International Workshop on CPT and Lorentz Symmetry in Field Theory 2017; Universidade do AlgarveFaro; Portugal; 6 July 2017 through 7 July 2017; Code 135301
Palabras clave
High energy physics, Perturbation techniques, Relativity
Citación
Journal of Physics: Conference Series, 952(1), art. no. 012005.