摘要
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 bb̄, WW*, and χ̃ <sub>1</sub> <sup>0</sup> χ̃ <sub>1</sub> <sup>0</sup> modes. In the Summer 2011, a 2σ excess was reported in the channel H → WW* → ℓ <sup>+</sup> νℓ <sup>-</sup> ν̄ around 130 - 140GeV range. Later on in December 2011 announcements were made that an excess was seen in the 124 - 126GeV range, while the SM Higgs boson above 131GeV up to about 600GeV is ruled out. We examine two scenarios of these mass ranges: (i) 130GeV < M <sub>hSM-like</sub> < 141GeV and show that the Higgs boson can decay into invisible neutralinos to evade the SM bound; and (ii) 120GeV < M <sub>hSM-like</sub> < 130GeV 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 <sub>6</sub> with TeV scale supersymmetry to illustrate the idea by scanning the parameter space to realize these two different scenarios. © 2012 SISSA.