Radiative corrections to Lorentz-invariance violation with higher-order operators: Fine-tuning problem revisited

Sebastian Ossandon, Camilo Reyes, Carlos M. Reyes

Resultado de la investigación: Article

Resumen

We study the possible effects of large Lorentz violations that can appear in the effective models in which the Lorentz symmetry breakdown is performed with higher-order operators. For this we consider the Myers and Pospelov extension of QED with dimension-five operators in the photon sector and standard fermions. We focus on the fermion self-energy at one-loop order and find small and finite radiative corrections in the even CPT sector. In the odd CPT sector a lower dimensional operator is generated which contains unsuppressed effects of Lorentz violation leading to a possible fine-tuning. For the calculation of divergent diagrams we use dimensional regularization and consider an arbitrary background four-vector.

Idioma originalEnglish
Páginas (desde-hasta)194-198
Número de páginas5
PublicaciónNuclear and Particle Physics Proceedings
Volumen267-269
DOI
EstadoPublished - 1 ene 2015
Publicado de forma externa

Huella dactilar

invariance
sectors
tuning
operators
fermions
breakdown
diagrams
photons
symmetry
energy

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

Citar esto

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Radiative corrections to Lorentz-invariance violation with higher-order operators : Fine-tuning problem revisited. / Ossandon, Sebastian; Reyes, Camilo; Reyes, Carlos M.

En: Nuclear and Particle Physics Proceedings, Vol. 267-269, 01.01.2015, p. 194-198.

Resultado de la investigación: Article

TY - JOUR

T1 - Radiative corrections to Lorentz-invariance violation with higher-order operators

T2 - Fine-tuning problem revisited

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AU - Reyes, Camilo

AU - Reyes, Carlos M.

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AB - We study the possible effects of large Lorentz violations that can appear in the effective models in which the Lorentz symmetry breakdown is performed with higher-order operators. For this we consider the Myers and Pospelov extension of QED with dimension-five operators in the photon sector and standard fermions. We focus on the fermion self-energy at one-loop order and find small and finite radiative corrections in the even CPT sector. In the odd CPT sector a lower dimensional operator is generated which contains unsuppressed effects of Lorentz violation leading to a possible fine-tuning. For the calculation of divergent diagrams we use dimensional regularization and consider an arbitrary background four-vector.

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