Abstract
Motivated by the recent results in the standard model (SM) Higgs boson search at the Large Hadron Collider (LHC) we investigate the SM-like CP-even Higgs boson of the U(1)′-extended minimal supersymmetric standard model (UMSSM) and its branching ratio into the \( b\overline b \), WW *, and \( \widetilde{\chi }_1^0\widetilde{\chi }_1^0 \) modes. In the Summer 2011, a 2σ excess was reported in the channel \( H \to W{W^* } \to {\ell^{+} }\nu {\ell^{-} }\overline \nu \) around 130 − 140 GeV range. Later on in December 2011 announcements were made that an excess was seen in the 124 − 126 GeV range, while the SM Higgs boson above 131 GeV up to about 600 GeV is ruled out. We examine two scenarios of these mass ranges: (i) \( {13}0 {\text{GeV}} < {M_{{h_{{\text{SM}} - {\text{like}}}}}} < {141} {\text{GeV}} \) and show that the Higgs boson can decay into invisible neutralinos to evade the SM bound; and (ii) \( {12}0 {\text{GeV}} < {M_{{h_{{\text{SM}} - {\text{like}}}}}} < {13}0 {\text{GeV}} \) and show that the Higgs boson can avoid decaying into neutralinos and thus gives enhanced rates into visible particles. We use the η model of E 6 with TeV scale supersymmetry to illustrate the idea by scanning the parameter space to realize these two different scenarios.
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Chang, CF., Cheung, K., Lin, YC. et al. Mimicking the standard model Higgs boson in UMSSM. J. High Energ. Phys. 2012, 128 (2012). https://doi.org/10.1007/JHEP06(2012)128
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DOI: https://doi.org/10.1007/JHEP06(2012)128