# 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: Contribución a una revistaArtículorevisión exhaustiva

## 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 original Inglés 194-198 5 Nuclear and Particle Physics Proceedings 267-269 https://doi.org/10.1016/j.nuclphysbps.2015.10.102 Publicada - 2015 Sí

## Huella

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