1303.4490 (Lei Wang et al.)

LHC diphoton Higgs signal in the Higgs triplet model with Y=0    [PDF]

Lei Wang, Xiao-Fang Han

We study the implications of the LHC diphoton Higgs signal on the Higgs triplet model with Y=0, which predicts two neutral CP-even Higgs bosons $h$, $H$ and a pair of charged Higgs $H^\pm$. We discuss three different scenarios: (i) the observed boson is the light Higgs boson $h$; (ii) it is the heavy Higgs boson $H$; (iii) the observed signal is from the almost degenerate $h$ and $H$. We find that the Higgs diphoton rates in the first two scenarios can be enhanced compared to the SM value, which can fit the Higgs diphoton data at the LHC well. Meanwhile, another CP-even Higgs boson production rate can be suppressed enough not to be observed at the collider. For the third scenario, the Higgs diphoton rate is suppressed, which is disfavored by the experimental data. Also, we study the correlations between $h\to Z\gamma$ and $h\to\gamma\gamma$ and find that the two rates have the positive correlations for the three scenarios.

View original: http://arxiv.org/abs/1303.4490