Environmental CPT Violation in an Expanding Universe in String Theory

We consider a model of an expanding Universe in string theory that yields `environmental' CPT violation for fermions, in the sense of different dispersion relations for fermions and antifermions. These are induced by a cosmological background with constant torsion provided by the Kalb-Ramond an...

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Detalles Bibliográficos
Autores principales: Ellis, John, Mavromatos, Nick E., Sarkar, Sarben
Lenguaje:eng
Publicado: 2013
Materias:
General Relativity and Cosmology
Acceso en línea:https://dx.doi.org/10.1016/j.physletb.2013.07.016
http://cds.cern.ch/record/1543296
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author Ellis, John
Mavromatos, Nick E.
Sarkar, Sarben
author_facet Ellis, John
Mavromatos, Nick E.
Sarkar, Sarben
author_sort Ellis, John
collection CERN
description We consider a model of an expanding Universe in string theory that yields `environmental' CPT violation for fermions, in the sense of different dispersion relations for fermions and antifermions. These are induced by a cosmological background with constant torsion provided by the Kalb-Ramond antisymmetric tensor field (axion) of the string gravitational multiplet. This effect induces different densities of neutrinos and antineutrinos while in chemical equilibrium, offering new scenarios for leptogenesis and baryogenesis even in the absence of CP violation.
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institution Organización Europea para la Investigación Nuclear
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publishDate 2013
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spelling cern-15432962023-03-14T19:39:51Zdoi:10.1016/j.physletb.2013.07.016http://cds.cern.ch/record/1543296engEllis, JohnMavromatos, Nick E.Sarkar, SarbenEnvironmental CPT Violation in an Expanding Universe in String TheoryGeneral Relativity and CosmologyWe consider a model of an expanding Universe in string theory that yields `environmental' CPT violation for fermions, in the sense of different dispersion relations for fermions and antifermions. These are induced by a cosmological background with constant torsion provided by the Kalb-Ramond antisymmetric tensor field (axion) of the string gravitational multiplet. This effect induces different densities of neutrinos and antineutrinos while in chemical equilibrium, offering new scenarios for leptogenesis and baryogenesis even in the absence of CP violation.We consider a model of an expanding Universe in string theory that yields 'environmental' CPT violation for fermions, in the sense of different dispersion relations for fermions and antifermions. These are induced by a cosmological background with constant torsion provided by the Kalb-Ramond antisymmetric tensor field (axion) of the string gravitational multiplet. This effect induces different densities of neutrinos and antineutrinos while in chemical equilibrium, offering new scenarios for leptogenesis and baryogenesis even in the absence of CP violation.We consider a model of an expanding Universe in string theory that yields ‘environmental’ CPT violation for fermions, in the sense of different dispersion relations for fermions and antifermions. These are induced by a cosmological background with constant torsion provided by the Kalb–Ramond antisymmetric tensor field (axion) of the string gravitational multiplet. This effect induces different densities of neutrinos and antineutrinos while in chemical equilibrium, offering new scenarios for leptogenesis and baryogenesis even in the absence of CP violation.We consider a model of an expanding Universe in string theory that yields `environmental' CPT violation for fermions, in the sense of different dispersion relations for fermions and antifermions. These are induced by a cosmological background with constant torsion provided by the Kalb-Ramond antisymmetric tensor field (axion) of the string gravitational multiplet. This effect induces different densities of neutrinos and antineutrinos while in chemical equilibrium, offering new scenarios for leptogenesis and baryogenesis even in the absence of CP violation.arXiv:1304.5433KCL-PH-TH-2013-13LCTS-2013-07CERN-PH-TH-2013-079KCL-PH-TH-2013-13LCTS-2013-07CERN-PH-TH-2013-079oai:cds.cern.ch:15432962013-04-22
spellingShingle General Relativity and Cosmology
Ellis, John
Mavromatos, Nick E.
Sarkar, Sarben
Environmental CPT Violation in an Expanding Universe in String Theory
title Environmental CPT Violation in an Expanding Universe in String Theory
title_full Environmental CPT Violation in an Expanding Universe in String Theory
title_fullStr Environmental CPT Violation in an Expanding Universe in String Theory
title_full_unstemmed Environmental CPT Violation in an Expanding Universe in String Theory
title_short Environmental CPT Violation in an Expanding Universe in String Theory
title_sort environmental cpt violation in an expanding universe in string theory
topic General Relativity and Cosmology
url https://dx.doi.org/10.1016/j.physletb.2013.07.016
http://cds.cern.ch/record/1543296
work_keys_str_mv AT ellisjohn environmentalcptviolationinanexpandinguniverseinstringtheory
AT mavromatosnicke environmentalcptviolationinanexpandinguniverseinstringtheory
AT sarkarsarben environmentalcptviolationinanexpandinguniverseinstringtheory

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