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Fermionic decay of charged Higgs boson in low mass region in Georgi Machacek Model
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abstract
At the Large Hadron Collider (LHC), ATLAS and CMS collaborations observed various decay modes of the light charged Higgs bosons produced by top (anti)quark decays. In this paper, we are interested in the subsequent decay of the light charged Higgs boson into a charm and a strange quark-antiquark pair and into a tau and a tau-neutrino pair, separately, in the context of the Georgi-Machacek model, which offers a large triplet vacuum expectation value (vev) preserving custodial symmetry. We show that these experimental observations constrain the triplet vev from above. We explore the model parameter space consistent with the theoretical constraints, the latest Higgs data and the experimental data for light charged Higgs decaying to $cs$ and $\tau\nu_{\tau}$.
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Fermionic decay of light charged pseudoscalar in Georgi Machacek model
Combining the cs and tau-nu charged-Higgs channels from ATLAS and CMS, the author obtains a tighter upper limit on the triplet vev v2 for GM-model pseudoscalar masses below 160 GeV than the earlier b→sγ constraint.
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