Large diphoton Higgs rates from supersymmetric triplets - INSPIRE

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Large diphoton Higgs rates from supersymmetric triplets

Antonio Delgado
(
- Notre Dame U.
)
,
Germano Nardini
(
- Bielefeld U.
)
,
Mariano Quiros
(
- ICREA, Barcelona and
- Barcelona, IFAE
)

Jul, 2012

11 pages

Published in:

Phys.Rev.D 86 (2012) 115010

e-Print:

1207.6596 [hep-ph]

DOI:

10.1103/PhysRevD.86.115010

Report number:

BI-TP-2012-31,
UAB-FT-714

View in:

ADS Abstract Service

reference search68 citations

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Abstract: (arXiv)

Recent results on Higgs searches at the LHC point towards the existence of a Higgs boson with mass of about 126 GeV whose diphoton decay rate tends to be larger than in the Standard Model. These results are in tension with natural MSSM 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.

Note:

11 pages, 8 eps figures; v2: Small corrections in numerical calculations and two figures. Conclusions unchanged

12.60.Jv
14.80.Da
Higgs particle: mass
family: 3
photon: pair production
Higgs particle: radiative decay
supersymmetry
triplet
minimal supersymmetric standard model
CERN LHC Coll

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