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arXiv · 1601.00534

Explaining 750 GeV diphoton excess from top/bottom partner cascade decay in two-Higgs-doublet model extension

Xiao-Fang Han·Lei Wang·Lei Wu·Jin Min Yang·Mengchao Zhang
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Abstract

In this paper, we interpret the 750 GeV diphoton excess in the Zee-Babu extension of the two-Higgs-doublet model by introducing a top partner ($T$)/bottom partner ($B$). In the alignment limit, the 750 GeV resonance is identified as the heavy CP-even Higgs boson ($H$), which can be sizably produced via the QCD process $pp \to T\bar{T}$ or $pp \to B\bar{B}$ followed by the decay $T\to Ht$ or $B \to Hb$. The diphoton decay rate of $H$ is greatly enhanced by the charged singlet scalars predicted in the Zee-Babu extension and the total width of $H$ can be as large as 7 GeV. Under the current LHC constraints, we scan the parameter space and find that such an extension can account for the observed diphoton excess.

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Xiao-Fang Han, Lei Wang, Lei Wu, Jin Min Yang, Mengchao Zhang. 2016-03-24. Explaining 750 GeV diphoton excess from top/bottom partner cascade decay in two-Higgs-doublet model extension. https://doi.org/10.1016/j.physletb.2016.03.035

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