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arXiv 2106.13656hep-ph
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在LHC上发现轻荷希格斯玻色子的新模式

New Discovery Modes for a Light Charged Higgs Boson at the LHC

A. Arhrib, R. Benbrik, M. Krab, B. Manaut, S. Moretti, Yan Wang, Qi-Shu Yan

备注：
17 pages, 5 figures; a few typos were corrected and two references were added
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摘要：

在大型强子对撞机（LHC）上，ATLAS和CMS合作一直在通过顶（反）夸克产生和衰变通道寻找轻带电希格斯玻色子，如$pp\to t \bar{t}$，其中一个顶（反）夸克衰变为带电希格斯玻色子和$b$（反）夸克，当衰变是运动学开放的（即，当为$m_{H^\pm}\lesssim m_t$时）。在本文中，我们提出了在大型强子对撞机上进行新的搜索，涉及在2-希格斯双重模型（2 HDM）Type-I和-X场景中通过其对产生通道（例如$pp\to H^\pm h/A$和$pp\to H^+ H^-$）来寻找轻荷希格斯玻色子。通过聚焦于重$H$态扮演标准模型（SM）类希格斯玻色子玻色子的角色的情况下，质量接近125 GeV，我们研究了上述希格斯玻色子玻色子对的产生通道，并调查他们的玻色子衰变，如$H^\pm \to W^{\pm } h$和/或$H^\pm \to W^{\pm } A$。我们证明，轻荷希格斯玻色子状态，$m_{H^\pm}\lesssim m_t$，在大型强子对撞机，这样的双希格斯生产和衰变通道可以产生的事件率远远大于从$pp\to t\bar{t}\to t\bar{b} H^-$ + c.c.。我们专门研究了$h/A\to b\bar b$和$τ^+τ^-$衰变。因此，我们主张，所讨论的新的产生和衰变模式的组合可以导致在上述两种2 HDM类型的LHC中比顶（反）夸克轻的带电希格斯玻色子的另一种发现渠道。最后，为了激励ATLAS和CMS中的实验者搜索这样的签名，我们提出了16个基准点（BP），这是兼容的理论和实验约束。

英文摘要：

At the Large Hadron Collider (LHC), both the ATLAS and CMS Collaborations have been searching for light charged Higgs bosons via top (anti)quark production and decays channels, like $pp\to t \bar{t}$ with one top (anti)quark decaying into a charged Higgs boson and a $b$ (anti)quark, when the decay is kinematically open (i.e., when $m_{H^\pm}\lesssim m_t$). In this paper, we propose new searches at the LHC involving light charged Higgs bosons via their pair production channels like $pp\to H^\pm h/A$ and $pp\to H^+ H^-$ in the 2-Higgs Doublet Model (2HDM) Type-I and -X scenarios. By focusing on the case where the heavy $H$ state plays the role of the Standard Model (SM)-like Higgs boson with a mass near 125 GeV, we study the aforementioned Higgs boson pair production channels and investigate their bosonic decays, such as $H^\pm \to W^{\pm } h$ and/or $H^\pm \to W^{\pm } A$. We demonstrate that for a light charged Higgs boson state, with $m_{H^\pm}\lesssim m_t$, at the LHC, such di-Higgs production and decay channels can give rise to signatures with event rates much larger than those emerging from $pp\to t\bar{t}\to t\bar{b} H^-$ + c.c.. We specifically study $h/A\to b\bar b$ and $τ^+τ^-$ decays. We, therefore, claim that the discussed combination of new production and decay modes can result in an alternative discovery channel for charged Higgs bosons lighter than the top (anti)quark at the LHC within the above two 2HDM Types. Finally, in order to motivate experimentalists in ATLAS and CMS to search for such signatures, we propose 16 Benchmark Points (BPs) which are compatible with both theoretical and experimental constraints.

机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。

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