Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2009-01-28
JHEP 0905:028,2009
Physics
High Energy Physics
High Energy Physics - Phenomenology
17 pages, 14 figures, some clarifications added, typos corrected
Scientific paper
10.1088/1126-6708/2009/05/028
Predictions for LHC physics are worked out for a two-Higgs-doublet model having four generalized CP symmetries. In this maximally-CP-symmetric model (MCPM) the first fermion family is, at tree level, uncoupled to the Higgs fields and thus massless. The second and third fermion families have a very symmetric coupling to the Higgs fields. But through the electroweak symmetry breaking a large mass hierarchy is generated between these fermion families. Thus, the fermion mass spectrum of the model presents a rough approximation to what is observed in Nature. In the MCPM there are, as in every two-Higgs-doublet model, five physical Higgs bosons, three neutral ones and a charged pair. In the MCPM the couplings of the Higgs bosons to the fermions are completely fixed. This allows us to present clear predictions for the production at the LHC and for the decays of the physical Higgs bosons. As salient feature we find rather large cross sections for Higgs-boson production via Drell-Yan type processes. With experiments at the LHC it should be possible to check these predictions.
Maniatis Markos
Nachtmann Otto
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