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Dimensionless coupling of bulk scalars at the LHC

P-H Beauchemin1,2, G Azuelos1,3 and C P Burgess2

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RESEARCH NOTE FROM COLLABORATION

We identify the lowest-dimension interaction which is possible between standard model brane fields and bulk scalars in six dimensions. The lowest-dimension interaction is unique and involves a trilinear coupling between the standard model Higgs boson and the bulk scalar. Because this interaction has a dimensionless coupling, it depends only logarithmically on ultraviolet mass scales and heavy physics need not decouple from it. We compute its influence on Higgs physics at ATLAS and identify how large a coupling can be detected at the LHC. Besides providing a potentially interesting signal in Higgs-boson searches, such couplings provide a major observational constraint on 6D large-extra-dimensional models with scalars in the bulk.


PACS

13.85.Ni Inclusive production with identified hadrons

14.80.Bn Standard-model Higgs bosons

11.25.Wx String and brane phenomenology

11.27.+d Extended classical solutions; cosmic strings, domain walls, texture

Subjects

Particle physics and field theory

Dates

Issue 10 (October 2004)

Received 9 August 2004

Published 21 September 2004



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