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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...
Autores principales: | , , |
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Lenguaje: | eng |
Publicado: |
2011
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Materias: | |
Acceso en línea: | https://dx.doi.org/10.1007/JHEP11(2011)039 http://cds.cern.ch/record/1380518 |
_version_ | 1780923071570378752 |
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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 |
record_format | invenio |
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 |