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Light charged Higgs bosons decaying to charm and bottom quarks in models with two or more Higgs doublets
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Searches for light charged Higgs bosons (H^\pm) in the decay of top quarks, t -> H^\pm b, are being carried out at the LHC and at the Tevatron. It is assumed that the dominant decay channels for such an H^\pm state are either H^\pm -> \tau\nu or H^\pm -> cs, and separate searches are performed with comparable sensitivity to the parameters m_{H^\pm} and tanbeta of the scalar potential. The branching ratio for the decay H^\pm -> cb can be as large as 80% in the Aligned Two Higgs Doublet Model and in models with three or more Higgs doublets with natural flavour conservation, while satisfying the constraint from b -> s gamma for m_{H^\pm} < m_t. Although the current search strategy for H^\pm -> cs is also sensitive to H^\pm -> cb, a considerable gain in sensitivity could be obtained by tagging the b quark from the decay H^\pm -> cb. Such an analysis, which could be readily performed at the Tevatron and in the 7 TeV and 8 TeV runs of the LHC, would probe a parameter space of the fermionic couplings of H^\pm in the above models which at present cannot be probed by experimental observables in flavour physics.
Forward citations
Cited by 4 Pith papers
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Light scalars within the $\mathcal{CP}$-conserving Aligned-two-Higgs-doublet model
All seven light-scalar scenarios of the CP-conserving aligned two-Higgs-doublet model contain sizeable parameter regions compatible with current collider and flavour data, with the lightest new scalars bounded by LEP ...
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Charged Higgs Decay to Bottom and Charm Quarks from $Z_3$-Flavored Two Higgs Doublet Models
A Z3-flavored two-Higgs-doublet model admits benchmark points with enhanced H±→cb decay that match the ATLAS 130 GeV excess and could be probed at the LHeC.
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Flavor Constraints in a Generational Three Higgs Doublet Model
A generational three-Higgs-doublet model is constructed, and flavor constraints show that its additional Higgs bosons can be as light as about 1.5 TeV if the only flavor violation is the minimal amount needed to repro...
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Light charged Higgs boson production at future $ep$ colliders
Charged Higgs bosons in the 2HDM Type-III model could be detected at the LHeC with up to about 4 sigma significance at 100 fb^-1 and higher at larger luminosities for masses near 110 to 130 GeV.
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