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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Formato: | Articulo Preprint |
Lenguaje: | Inglés |
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2007
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Acceso en línea: | http://sedici.unlp.edu.ar/handle/10915/128590 |
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I19-R120-10915-128590 |
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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 |
_version_ |
1764820452572659713 |