### Abstract

A charged Higgs in the type II two-Higgs-doublet model (THDM) has been bounded to be above a few hundred GeV by the radiative B decays. A Higgs triplet extension of the THDM not only provides an origin of neutrino masses and a completely new doubly-charged Higgs decay pattern, but it also achieves a light-charged Higgs with a mass of O(100) GeV through the new scalar couplings in the scalar potential. It was found that these light-charged Higgs decays depend on its mass m_{H± }, tanβ, and mixing effect sinθ_{±}: at tanβ=1, if m_{H± }>m_{W}+m_{Z}, b¯bW^{±}, W^{±}Z, and τν are the main decay modes; however, if m_{H± }<m_{W}+m_{Z}, the main decay modes are then b¯bW and τν, and at tanβ=30, the τν mode dominates the other decays. When m_{t}>m_{H± }+m_{b}, we found that the ATLAS and CMS recent upper bounds on the product of BR(t→H^{+}b)BR(H^{+}→τ^{+}ν) can be directly applied and will give a strict constraint on the correlation of m_{H± } and sinθ_{±}. If the upper bound of BR(t→H^{+}b)BR(H^{+}→τ^{+}ν) is satisfied (escaped) for m_{t}>(<)m_{H± }+m_{b}, it was found that the significance of discovering the charged Higgs through H^{±}→W^{±}Z is much lower than that through H^{±}→b¯bW^{±}. With a luminosity of 100 fb^{−1} at s=13 TeV and including the experimental bounds, the significance of the H^{±}→b¯bW^{±} signal can reach around 6.2(2.4)σ for m_{H± }<(>)m_{W}+m_{Z}.

Original language | English |
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Pages (from-to) | 443-449 |

Number of pages | 7 |

Journal | Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics |

Volume | 767 |

DOIs | |

Publication status | Published - 2017 Apr 10 |

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### All Science Journal Classification (ASJC) codes

- Nuclear and High Energy Physics