Towards testing a two-Higgs-doublet model with maximal CP symmetry at the LHC: Monte Carlo event generator implementation

Abstract

A Monte Carlo event generator is implemented for a two-Higgs-doublet model with maximal CP symmetry, the MCPM. The model contains five physical Higgs bosons; the ρ , behaving similarly to the standard-model Higgs boson, two extra neutral bosons h and h , and a charged pair H ± . The special feature of the MCPM is that, concerning the Yukawa couplings, the bosons h , h and H ± couple directly only to the second-generation fermions but with strengths given by the third-generation-fermion masses. Our event generator allows the simulation of the Drell-Yan-type production processes of h , h and H ± in proton-proton collisions at LHC energies. Also the subsequent leptonic decays of these bosons into the μ + μ − , μ + ν μ and μ −ν μ channels are studied as well as the dominant background processes. We estimate the integrated luminosities needed in pp collisions at center-of-mass energies of 8 and 14 TeV for significant observations of the Higgs bosons h , h and H ± in these muonic channels.

Building and testing models with extended Higgs sectors

“…Maniatis et al [257] constructed a model with "maximal CP symmetry" in which the scalar and Yukawa sectors were required to be invariant under three orthogonal usual CP symmetries and CP2. These conditions produced a very non-trivial Yukawa interaction patterns and predicted a rather unique phenomenology with various flavor-violating processes, which was explored in detail in [259,260,261]. Finally, CP3 can be extended as well but only for the special value of α = π/3 [262], see details below.…”

On exact minimization of Higgs potentials

“…The search for the Higgs boson at the Large Hadron Collider has initiated many theoretical studies of Higgs physicssee for instance [1][2][3][4][5][6][7][8][9][10][11]. The detection of the minima of a Higgs potential of any model is essential in order to determine the particle spectrum as well as the electroweak symmetry-breaking behavior.…”