Baradhwaj Coleppa, Felix Kling, Shufang Su
We study the implication of the LHC Higgs search results on the Type II Two Higgs-Doublet Model. In particular, we explore the scenarios in which the observed 126 GeV Higgs signal is interpreted as either the light CP-even Higgs h^0 or the heavy CP-even Higgs H^0. Imposing both theoretical and experimental constraints, we analyze the surviving parameter regions in m_H (m_h), m_A, m_{H^\pm}, tan\beta\ and sin(\beta-\alpha). We further identify the regions that could accommodate a 126 GeV Higgs with cross sections consistent with the observed Higgs signal. We find that in the h-126 case, we are restricted to narrow regions of sin(\beta-\alpha) \pm 1 with tan\beta\ up to 4, or extended regions in sin(\beta-\alpha) with tan\beta<1. The values of m_H, m_A and m_{H^\pm}, however, are relatively unconstrained. In the H-126 case, we are restricted to a narrow region of sin(\beta-\alpha)~0 with tan\beta\ up to about 7, or an extended region of sin(\beta-\alpha) between -0.6 to -0.1, with tan\beta\ extended to 30 or higher. m_A and m_{H^\pm} are nearly degenerate due to \Delta\rho\ constraints. Imposing flavor constraints shrinks the surviving parameter space significantly. We also investigate the correlation between \gamma\gamma, VV and bb/\tau\tau\ channels. \gamma\gamma\ and VV channels are most likely to be highly correlated with \gamma\gamma:VV~1 for the normalized cross sections.
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http://arxiv.org/abs/1305.0002
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