Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2009-03-04
Phys.Rev.D79:095014,2009
Physics
High Energy Physics
High Energy Physics - Phenomenology
25 pages, LaVTeX, 11 figures, 1 table
Scientific paper
10.1103/PhysRevD.79.095014
In this work, we examine a two-Higgs-doublet extension of the Standard Model in which one Higgs doublet is responsible for giving mass to both up- and down-type quarks, while a separate doublet is responsible for giving mass to leptons. We examine both the theoretical and experimental constraints on the model and show that large regions of parameter space are allowed by these constraints in which the effective couplings between the lightest neutral Higgs scalar and the Standard-Model leptons are substantially enhanced. We investigate the collider phenomenology of such a "leptophilic" two-Higgs-doublet model and show that in cases where the low-energy spectrum contains only one light, CP-even scalar, a variety of collider processes essentially irrelevant for the discovery of a Standard Model Higgs boson (specifically those in which the Higgs boson decays directly into a charged-lepton pair) can contribute significantly to the discovery potential of a light-to-intermediate-mass (m_h < 140 GeV) Higgs boson at the LHC.
Su Shufang
Thomas Brooks
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