Brane world models need low string scale

Antoniadis, Ignatios, Atkins, Michael and Calmet, Xavier (2011) Brane world models need low string scale. Journal of High Energy Physics, 2011 (11). 039. ISSN 1029-8479

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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.

Item Type: Article
Schools and Departments: School of Mathematical and Physical Sciences > Physics and Astronomy
Subjects: Q Science > QC Physics
Q Science > QC Physics > QC0770 Nuclear and particle physics. Atomic energy. Radioactivity > QC0793 Elementary particle physics
Depositing User: Xavier Calmet
Date Deposited: 01 Nov 2012 11:54
Last Modified: 14 Mar 2017 02:07

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