Identifying a light charged Higgs boson at the LHC Run II
Identifying a light charged Higgs boson at the LHC Run II
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DOI：
10.1016/j.physletb.2017.10.006
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发表时间：
2017-06
影响因子：
4.4
通讯作者：
A. Arhrib;R. Benbrik;R. Enberg;William Klemm;S. Moretti;S. Munir
中科院分区：
文献类型：
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作者：
A. Arhrib;R. Benbrik;R. Enberg;William Klemm;S. Moretti;S. Munir
我们分析了在CP守恒的2-Higgs Doublet模型（2 HDM）I型中，轻Higgs玻色子h的唯象意义，假设能量为s= 13 TeV，光度为O（100 fb− 1），在大型强子对撞机（LHC）运行II中带电H±态的探测前景。当足够轻时，这个h态可以打开玻色子衰变通道H±→ W±（τ）h，其分支比可能显著超过H±→ τ ν和H±→ cs通道。我们进行了广泛的扫描2 HDM类型-I参数空间，假设较重的两个CP-甚至希格斯玻色子，H，是观察到的SM-类状态，质量接近125 GeV。通过这些扫描，我们突出显示了其中m H±< m t+ m B的区域，这些区域仍然与来自实验搜索的最新限制一致。我们发现在这些区域中，当H±→ W±（γ）h衰变模式占主导地位时，h可以是高度疏费米的，在γγ通道中具有相当大的衰变率。这使得σ（pp → H±h→ W±（ψ）+4 γ）过程的总截面达到O（100 fb）。因此，我们研究在LHC Run II上观测到这一壮观信号的可能性。
We analyse the phenomenological implications of a light Higgs boson, h, within the CP-conserving 2-Higgs Doublet Model (2HDM) Type-I, for the detection prospects of the charged H±state at Run II of the Large Hadron Collider (LHC), assuming s= 13 TeV as energy and O (100 fb− 1) as luminosity. When sufficiently light, this h state can open up the bosonic decay channel H±→ W±(⁎) h, which may have a branching ratio significantly exceeding those of the H±→ τ ν and H±→ c s channels. We perform a broad scan of the 2HDM Type-I parameter space, assuming the heavier of the two CP-even Higgs bosons, H, to be the observed SM-like state with a mass near 125 GeV. Through these scans we highlight regions in which m H±< m t+ m b that are still consistent with the most recent limits from experimental searches. We find in these regions that, when the H±→ W±(⁎) h decay mode is the dominant one, the h can be highly fermiophobic, with a considerably large decay rate in the γγ channel. This can result in the total cross section of the σ (p p→ H±h→ W±(⁎)+ 4 γ) process reaching up to O (100 fb). We therefore investigate the possibility of observing this spectacular signal at the LHC Run II.