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arXiv 1908.00826hep-ph
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光荷希格斯玻色子衰变为粲夸克和底夸克及其在LEP2和未来$e^+e^-$对撞机上的研究

Light charged Higgs boson with dominant decay to a charm quark and a bottom quark and its search at LEP2 and future $e^+e^-$ colliders

A. G. Akeroyd, Stefano Moretti, Muyuan Song

摘要:

在3-Higgs双重模型(3 HDM)的背景下,研究了轻荷希格斯玻色子玻色子$H^\pm$衰变为$cb$的可能性,其质量在80 GeV $\le M_{H^\pm} \le 90$ GeV范围内.大型强子对撞机(LHC)对这种衰变的探测器目前对这个质量区域不敏感。它表明,搜索$H^\pm$在LEP 2可以补充由一个或两个$b$ -标签,这将使这样的大分支比$H^\pm\to cb$被探测在上述质量区。我们评论的可能性,这3 HDM的情况下,以解释在LEP 2,这是最适合的$M_{H^\pm}$约90 GeV的搜索$H^\pm$略有过剩,并讨论在未来的$e^+e^-$对撞机检测$H^\pm \to cb$衰变的前景。

英文摘要:

The possibility of a light charged Higgs boson $H^\pm$ that decays predominantly to $cb$ and with a mass in the range 80 GeV $\le M_{H^\pm} \le 90$ GeV is studied in the context of a 3-Higgs Doublet Model (3HDM). Searches for this decay at the Large Hadron Collider (LHC) do not have sensitivity to this mass region at present. It is shown that the searches for $H^\pm$ at LEP2 could be supplemented by either one or two $b$-tags, which would enable such large branching ratios for $H^\pm\to cb$ to be probed in the above mass region. We comment on the possibility of this 3HDM scenario to explain a slight excess in the searches for $H^\pm$ at LEP2, which is best fit by $M_{H^\pm}$ of around 90 GeV, and discuss the prospects for detecting $H^\pm \to cb$ decays at future $e^+e^-$ colliders.

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