Abstract
Extending the Standard Model (SM) scalar sector via the addition of one or more Higgs fields in higher dimensional representations adds one or more charged Higgs bosons to the spectrum. Some of these gauge representations with appropriate hypercharge contain doubly-charged Higgs bosons and can be easily distinguished from the models that contain only singly-charged Higgs bosons. In this study we focus on the more challenging question of distinguishing singly-charged Higgs bosons from different representations, viz. doublets and triplets of the SU(2)L gauge group. We consider a supersymmetric extension of the SM with a gauge singlet and an SU(2)L triplet with Y = 0 as a benchmark scenario which has rich phenomenological possibilities due to the presence of a light pseudoscalar associated with the Z3 symmetric superpotential. A detailed collider simulation considering all SM backgrounds has been carried out in order to determine which final states are more favourable for observing charged Higgs boson from particular representations as compared with others. We show that different representations can be probed and distinguished via singly-charged Higgs boson phenomenology at the 14 TeV LHC with an earliest data of ∼ 50 fb−1 of integrated luminosity.
Highlights
In this article we are interested in extensions of Higgs sector via various possible gauge representations
We consider a supersymmetric extension of the Standard Model (SM) with a gauge singlet and an SU(2)L triplet with Y = 0 as a benchmark scenario which has rich phenomenological possibilities due to the presence of a light pseudoscalar associated with the Z3 symmetric superpotential
We show that different representations can be probed and distinguished via singly-charged Higgs boson phenomenology at the 14 TeV LHC with an earliest data of ∼ 50 fb−1 of integrated luminosity
Summary
In the Standard Model we do not have any physical charged Higgs boson and this physical state can be achieved by extending the scalar sectors with at least one more SU(2)L doublet or triplet. In the simplest extension of MSSM, i.e. the NMSSM, the situation is similar, scenario (b) This is due to the fact that the singlet superfield, after acquiring vev, give rise to an additional scalar and pseudo-scalar in the spectrum but not to a charged Higgs boson. The most important decay mode is h±1 → ZW ± This interaction is present at tree-level in theories with scalar triplets which acquire vevs and break custodial symmetry at the tree-level. The pseudo Nambu-Goldstone mode of this extra U(1) symmetry that can be very light In this scenario the lightest charged Higgs boson can decay in a1W ± and Z W ± and if it is triplet-like its decay into fermions is suppressed. We briefly introduce the model which will be used later for the phenomenological studies to distinguish among doublet and triplet charged Higgs boson(s) at the LHC
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