Kingman Cheung, Chih-Ting Lu, Tzu-Chiang Yuan
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 (UMSSM) 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 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.
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http://arxiv.org/abs/1212.1288
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