Quantum corrections to Lorentz invariance violating theories: fine-tuning problem

It is of general agreement that a quantum gravity theory will most probably mean a breakdown of the standard structure of space–time at the Planck-scale. This has motivated the study of Planck-scale Lorentz Invariance Violating (LIV) theories and the search for its observational signals. Yet, it has...

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Autores principales: Crichigno, Marcos, Vucetich, Héctor
Formato: Articulo Preprint
Lenguaje:Inglés
Publicado: 2007
Materias:
Física
Quantum corrections
Lorentz invariance
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/128590
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-128590
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Física
Quantum corrections
Lorentz invariance
spellingShingle Física
Quantum corrections
Lorentz invariance
Crichigno, Marcos
Vucetich, Héctor
Quantum corrections to Lorentz invariance violating theories: fine-tuning problem
topic_facet Física
Quantum corrections
Lorentz invariance
description It is of general agreement that a quantum gravity theory will most probably mean a breakdown of the standard structure of space–time at the Planck-scale. This has motivated the study of Planck-scale Lorentz Invariance Violating (LIV) theories and the search for its observational signals. Yet, it has been recently shown that, in a simple scalar-spinor Yukawa theory, radiative corrections to tree-level Planck-scale LIV theories can induce large Lorentz violations at low energies, in strong contradiction with experiment, unless an unnatural fine-tuning mechanism is present. In this Letter, we show the calculation of the electron self-energy in the framework given by the Myers–Pospelov model for a Lorentz invariance violating QED. We find a contribution that depends on the preferred frame four-velocity which is not Planck-scale suppressed, showing that this model suffers from the same disease . Comparison with Hughes–Drever experiments requires a fine-tuning of 21 orders of magnitude for this model not to disagree with experiment.
format Articulo
Preprint
author Crichigno, Marcos
Vucetich, Héctor
author_facet Crichigno, Marcos
Vucetich, Héctor
author_sort Crichigno, Marcos
title Quantum corrections to Lorentz invariance violating theories: fine-tuning problem
title_short Quantum corrections to Lorentz invariance violating theories: fine-tuning problem
title_full Quantum corrections to Lorentz invariance violating theories: fine-tuning problem
title_fullStr Quantum corrections to Lorentz invariance violating theories: fine-tuning problem
title_full_unstemmed Quantum corrections to Lorentz invariance violating theories: fine-tuning problem
title_sort quantum corrections to lorentz invariance violating theories: fine-tuning problem
publishDate 2007
url http://sedici.unlp.edu.ar/handle/10915/128590
work_keys_str_mv AT crichignomarcos quantumcorrectionstolorentzinvarianceviolatingtheoriesfinetuningproblem
AT vucetichhector quantumcorrectionstolorentzinvarianceviolatingtheoriesfinetuningproblem
bdutipo_str Repositorios
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