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Gaugephobic Higgs signals at the LHC

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Jamison Gallowaya, Bob McElrathb, John McRavena and John Terninga

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The Gaugephobic Higgs model provides an interpolation between three different models of electroweak symmetry breaking: Higgsless models, Randall-Sundrum models, and the Standard Model. At parameter points between the extremes, Standard Model Higgs signals are present at reduced rates, and Higgsless Kaluza-Klein excitations are present with shifted masses and couplings, as well as signals from exotic quarks necessary to protect the Zbbar b coupling. Using a new implementation of the model in SHERPA, we show the LHC signals which differentiate the generic Gaugephobic Higgs model from its limiting cases. These are all signals involving a Higgs coupling to a Kaluza-Klein gauge boson or quark. We identify the clean signal ppW(i)WH mediated by a Kaluza-Klein W, which can be present at large rates and is enhanced for even Kaluza-Klein numbers. Due to the very hard lepton coming from the W± decay, this signature has little background, and provides a better discovery channel for the Higgs than any of the Standard Model modes, over its entire mass range. A Higgs radiated from new heavy quarks also has large rates, but is much less promising due to very high multiplicity final states.

Keywords

Phenomenology of Field Theories in Higher Dimensions

 

E-print Number: 0908.0532

Cited: by |

Refers: to

PACS

12.60.Fr Extensions of electroweak Higgs sector

14.80.Bn Standard-model Higgs bosons

13.75.Cs Nucleon-nucleon interactions (including antinucleons, deuterons, etc.)

13.38.Be Decays of W bosons

11.25.Wx String and brane phenomenology

14.70.Fm W bosons

Subjects

Particle physics and field theory

Dates

Issue 11 (November 2009)

Received 19 August 2009, accepted for publication 25 October 2009

Published 9 November 2009



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