A Higgs boson near 125 GeV with enhanced di-photon signal in the NMSSM

Abstract

A natural region in the parameter space of the NMSSM can accomodate a CP-even Higgs boson with a mass of about 125GeV and, simultaneously, an enhanced cross section times branching ratio in the di-photon channel. This happens in the case of strong singlet-doublet mixing, when the partial width of a 125GeV Higgs boson into bb̄ is strongly reduced. In this case, a second lighter CP-even Higgs boson is potentially also observable at the LHC.