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Higgs decay width in multiscalar doublet models

Mantry, Sonny and Trott, Michael and Wise, Mark B. (2008) Higgs decay width in multiscalar doublet models. Physical Review D, 77 (1). Art. No. 013006. ISSN 2470-0010. doi:10.1103/PhysRevD.77.013006.

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We show that there are regions of parameter space in multiscalar doublet models where, in the first few hundred inverse femtobarns of data, the new charged and neutral scalars are not directly observable at the LHC and yet the Higgs decay rate to b[overline b] is changed significantly from its standard model value. For a light Higgs with a mass less than 140 GeV, this can cause a large change in the number of two photon and tau+tau- Higgs decay events expected at the LHC compared to the minimal standard model. In the models we consider, the principle of minimal flavor violation is used to suppress flavor changing neutral currents. This paper emphasizes the importance of measuring the properties of the Higgs boson at the LHC; for a range of parameters the model considered has new physics at the TeV scale that is invisible, in the first few hundred inverse femtobarns of integrated luminosity at the LHC, except indirectly through the measurement of Higgs boson properties.

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Additional Information:©2008 The American Physical Society. (Received 27 September 2007; published 17 January 2008) We thank Marat Gataullin for many helpful comments. This work was supported in part by the DOE grant number DE-FG03-92ER40701 and DE-FG03-97ER40546.
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
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Deposited On:29 Jan 2008
Last Modified:08 Nov 2021 20:59

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