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Brane World Models Need Low String Scale

Models with large extra dimensions offer the possibility of the Planck scale being of order the electroweak scale, thus alleviating the gauge hierarchy problem. We show that these models suffer from a breakdown of unitarity at around three quarters of the low effective Planck scale. An obvious candi...

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Detalles Bibliográficos
Autores principales: Antoniadis, Ignatios, Atkins, Michael, Calmet, Xavier
Lenguaje:eng
Publicado: 2011
Materias:
Acceso en línea:https://dx.doi.org/10.1007/JHEP11(2011)039
http://cds.cern.ch/record/1380518
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author Antoniadis, Ignatios
Atkins, Michael
Calmet, Xavier
author_facet Antoniadis, Ignatios
Atkins, Michael
Calmet, Xavier
author_sort Antoniadis, Ignatios
collection CERN
description Models with large extra dimensions offer the possibility of the Planck scale being of order the electroweak scale, thus alleviating the gauge hierarchy problem. We show that these models suffer from a breakdown of unitarity at around three quarters of the low effective Planck scale. An obvious candidate to fix the unitarity problem is string theory. We therefore argue that it is necessary for the string scale to appear below the effective Planck scale and that the first signature of such models would be string resonances. We further translate experimental bounds on the string scale into bounds on the effective Planck scale.
id cern-1380518
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2011
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spelling cern-13805182019-09-30T06:29:59Zdoi:10.1007/JHEP11(2011)039http://cds.cern.ch/record/1380518engAntoniadis, IgnatiosAtkins, MichaelCalmet, XavierBrane World Models Need Low String ScaleParticle Physics - PhenomenologyModels with large extra dimensions offer the possibility of the Planck scale being of order the electroweak scale, thus alleviating the gauge hierarchy problem. We show that these models suffer from a breakdown of unitarity at around three quarters of the low effective Planck scale. An obvious candidate to fix the unitarity problem is string theory. We therefore argue that it is necessary for the string scale to appear below the effective Planck scale and that the first signature of such models would be string resonances. We further translate experimental bounds on the string scale into bounds on the effective Planck scale.arXiv:1109.1160CERN-PH-TH-2011-218oai:cds.cern.ch:13805182011-09-07
spellingShingle Particle Physics - Phenomenology
Antoniadis, Ignatios
Atkins, Michael
Calmet, Xavier
Brane World Models Need Low String Scale
title Brane World Models Need Low String Scale
title_full Brane World Models Need Low String Scale
title_fullStr Brane World Models Need Low String Scale
title_full_unstemmed Brane World Models Need Low String Scale
title_short Brane World Models Need Low String Scale
title_sort brane world models need low string scale
topic Particle Physics - Phenomenology
url https://dx.doi.org/10.1007/JHEP11(2011)039
http://cds.cern.ch/record/1380518
work_keys_str_mv AT antoniadisignatios braneworldmodelsneedlowstringscale
AT atkinsmichael braneworldmodelsneedlowstringscale
AT calmetxavier braneworldmodelsneedlowstringscale