When the Higgs meets the Top: Search for t --> ch^0 at the LHC

Abstract

The newly discovered "Higgs" boson h^0, being lighter than the top quark t, opens up new probes for flavor and mass generation. In the general two Higgs doublet model, new ct, cc and tt Yukawa couplings could modify h^0 properties. If t --> ch^0 occurs at the percent level, the observed ZZ^* and γγsignal events may have accompanying cbW activity coming from t\bar{t} feeddown. We suggest that t --> ch^0 can be searched for via h^0 --> ZZ^*, γγ, WW^* and b\bar{b}, perhaps even τ^+τ^- modes in t\bar{t} events. Existing data might be able to reveal some clues for t --> ch^0 signature, or push the branching ratio B(t --> ch^0) down to below the percent level.

5 pages, 3 figures, version to appear in PLB

References in corpus (9)

• Observation of a new particle in the search for the Standard Model Higgs boson with the ATLAS detector at the LHC
• Observation of a new boson at a mass of 125 GeV with the CMS experiment at the LHC
• NNLO corrections to top pair production at hadron colliders: the quark-gluon reaction
• Flavor-phenomenology of two-Higgs-doublet models with generic Yukawa structure
• Implications of lepton flavor universality violations in B decays
• Measurement of the t t-bar production cross section in the dilepton channel in pp collisions at sqrt(s) = 7 TeV
• Search for anomalous production of multilepton events in pp collisions at sqrt(s) = 7 TeV
• Search for flavor changing neutral currents in top quark decays in pp collisions at 7 TeV
• Doubly resonant WW plus jet signatures at the LHC

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