  Motivated by the excess in the diphoton production rate of the Higgs boson at
the Large Hadron Collider (LHC), we investigate the possibility that one of the
CP-even Higgs bosons of the extra U(1) extended minimal supersymmetric standard
model can give a consistent result. We scan the parameter space for a
standard-model-like Higgs boson such that the mass is in the range of 124-127
GeV and the production rate \sigma xB of the WW*, ZZ* modes are consistent with
the standard model (SM) values while that of \gamma\gamma is enhanced relative
to the SM value. We find that the SM-like Higgs boson is mostly the lightest
CP-even Higgs boson and it has a strong mixing with the second lightest one,
which is largely singlet-like. The implications on Z\gamma production rate and
properties of the other Higgs bosons are also studied.

High Energy Physics - Phenomenology;High Energy Physics - Experiment