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Two-Higgs-doublet model with a color-triplet scalar: a joint explanation for top-quark forward-backward asymmetry and Higgs decay to diphoton

Abstracts

The excess of top-quark forward-backward asymmetry (A(FB)(t)) reported by the Tevatron and the enhancement of the Higgs decay to diphoton observed at the LHC may point to a same origin of new physics. In this note we examined such anomalies in the two-Higgs-doublet model with a color-triplet scalar. We found that under current experimental constraints this model can simultaneously explain both anomalies at 1 sigma level. Also, we examined the Higgs decay h -> Z gamma and displayed its correlation with h -> gamma gamma. We found that unlike other models, this model predicts a special correlation between h -> Z gamma and h -> gamma gamma, i.e., the Z gamma rate is highly suppressed while the gamma gamma rate is enhanced. This behavior may help to distinguish this model in the future high luminosity run of the LHC.
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Journal:EUROPEAN PHYSICAL JOURNAL C
Recommended references: Han, Chengcheng,Liu, Ning,Wu, Lei,Yang, Jin Min,Zhang, Yang.(2016).Two-Higgs-doublet model with a color-triplet scalar: a joint explanation for top-quark forward-backward asymmetry and Higgs decay to diphoton.EUROPEAN PHYSICAL JOURNAL C.[ChinaXiv:201605.01153] (Click&Copy)
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[V1] 2016-05-09 11:04:15 chinaXiv:201605.01153V1 Download
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