Large diphoton Higgs rates from supersymmetric triplets

Antonio Delgado, Germano Nardini, Mariano Quirós

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    44 Citations (Scopus)

    Abstract

    Recent results on Higgs searches at the LHC point toward the existence of a Higgs boson with mass of about 126GeV whose diphoton decay rate tends to be larger than in the Standard Model. These results are in tension with natural minimal supersymmetric Standard Model scenarios: such a Higgs mass requires heavy (third-generation) squarks which reintroduce some amount of fine-tuning and in general the Higgs diphoton decay rate tends to follow the Standard Model result. In this paper we prove that these problems can be alleviated by introducing an extra supersymmetric triplet coupled to the Higgs in the superpotential. This superfield generates a sizeable tree-level correction to the Higgs mass so that the third generation is no longer required to be heavy, and its charged component enhances the diphoton Higgs decay rates by as much as 50% with respect to the Standard Model values. We also show that such a scenario is compatible with present electroweak precision observables. © 2012 American Physical Society.
    Original languageEnglish
    Article number115010
    JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
    Volume86
    Issue number11
    DOIs
    Publication statusPublished - 3 Dec 2012

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