Reducing constraints in a higher dimensional extension of the Randall and Sundrum model

Archer, Paul R and Huber, Stephan J (2011) Reducing constraints in a higher dimensional extension of the Randall and Sundrum model. Journal of High Energy Physics, 2011 (3). p. 18. ISSN 1029-8479

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In order to investigate the phenomenological implications of warped spaces in more than five dimensions, we consider a 4 + 1 + δ dimensional extension to the Randall and Sundrum model in which the space is warped with respect to a single direction by the presence of an anisotropic bulk cosmological constant. The Einstein equations are solved, giving rise to a range of possible spaces in which the δ additional spaces are warped. Here we consider models in which the gauge fields are free to propagate into such spaces. After carrying out the Kaluza Klein (KK) decomposition of such fields it is found that the KK mass spectrum changes significantly depending on how the δ additional dimensions are warped. We proceed to compute the lower bound on the KK mass scale from electroweak observables for models with a bulk SU(2) × U(1) gauge symmetry and models with a bulk SU(2) R × SU(2) L × U(1) gauge symmetry. It is found that in both cases the most favourable bounds are approximately M KK ≳ 2 TeV, corresponding to a mass of the first gauge boson excitation of about 4 – 6 TeV. Hence additional warped dimensions offer a newwayof reducing the constraints on the KK scale.

Item Type: Article
Schools and Departments: School of Mathematical and Physical Sciences > Physics and Astronomy
Subjects: Q Science > QC Physics
Depositing User: Stephan Huber
Date Deposited: 06 Feb 2012 20:24
Last Modified: 07 Mar 2017 00:37

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