## Abstract

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} ±, tan β and sin(β - α). 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 ^{0}-126 case, we are restricted to narrow regions of sin(β - α) ≈ ±1 with tan β up to 4, or an extended region with 0.55 < sin(β - α) < 0.9 and 1.5 < tan β < 4. The values of m _{H}, m _{A} and m _{H} ±, however, are relatively unconstrained. In the H ^{0}-126 case, we are restricted to a narrow region of sin(β - α) ~ 0 with tan β up to about 8, or an extended region of sin(β - α) between -0.8 to -0.05, with tan β extended to 30 or higher. m _{A} and m _{H} ± are nearly degenerate due to Δρ constraints. Imposing flavor constraints shrinks the surviving parameter space significantly for the H ^{0}-126 case, limiting tan β â‰ 10, but has little effect in the h ^{0}-126 case. We also investigate the correlation between γγ, V V and bb/ττ channels. γγ and V V channels are most likely to be highly correlated with γγ: V V ~ 1 for the normalized cross sections.

Original language | English (US) |
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Article number | 161 |

Journal | Journal of High Energy Physics |

Volume | 2014 |

Issue number | 1 |

DOIs | |

State | Published - Jan 2014 |

## Keywords

- Phenomenological Models

## ASJC Scopus subject areas

- Nuclear and High Energy Physics