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Strong tree level unitarity violations in the extra dimensional standard model with scalars in the bulk

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Curtis, Stefania De and Dominici, Daniele and Peláez Sagredo, José Ramón (2003) Strong tree level unitarity violations in the extra dimensional standard model with scalars in the bulk. Physical review D, 67 (7). ISSN 0556-2821

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Official URL: http://dx.doi.org/10.1103/PhysRevD.67.076010


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Abstract

We show how the tree-level unitarity violations of compactified extra dimensional extensions of the standard model become much stronger when the scalar sector is included in the bulk. This effect occurs when the couplings are not suppressed for larger Kaluza-Klein levels, and could have relevant consequences for the phenomenology of the next generation of colliders. We also introduce a simple and generic formalism to obtain unitarity bounds for finite energies, taking into account coupled channels including the towers of Kaluza-Klein excitations.


Item Type:Article
Additional Information:

©2003 The American Physical Society.
J.R.P. is thankful for support from the Spanish CICYT, Project Nos. PB98-0782 and BFM2000 1326, as well as the European Community for a Marie Curie fellowship under contract MCFI-2001-01155.

Uncontrolled Keywords:Kaluza-klein excitations; Yang-mills theory; Equivalence theorem; Electroweak observables; Vector bosons; Tev; Bounds; Supersymmetry; Breaking; Physics
Subjects:Sciences > Physics > Physics-Mathematical models
Sciences > Physics > Mathematical physics
ID Code:35546
Deposited On:05 Feb 2016 16:54
Last Modified:10 Dec 2018 15:09

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