https://doi.org/10.1140/epjc/s10052-013-2664-7
Regular Article - Theoretical Physics
Two-Higgs-doublet model with a color-triplet scalar: a joint explanation for top-quark forward–backward asymmetry and Higgs decay to diphoton
1
Physics Department, Henan Normal University, Xinxiang, 453007, China
2
State Key Laboratory of Theoretical Physics, Institute of Theoretical Physics, Academia Sinica, Beijing, 100190, China
* e-mail: wlln@mail.ustc.edu.cn
Received:
31
March
2013
Revised:
13
November
2013
Published online:
6
December
2013
The excess of top-quark forward–backward asymmetry (
) 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 1σ level. Also, we examined the Higgs decay h→Zγ and displayed its correlation with h→γγ. We found that unlike other models, this model predicts a special correlation between h→Zγ and h→γγ, i.e., the Zγ rate is highly suppressed while the γγ rate is enhanced. This behavior may help to distinguish this model in the future high luminosity run of the LHC.
© Springer-Verlag Berlin Heidelberg and Società Italiana di Fisica, 2013
