arXiv 2012.057352020-12-10hep-phhep-exhep-lat

在对撞机上探测顶变中性Higgs耦合

Probing Top Changing Neutral Higgs Couplings at Colliders

Wei-Shu Hou, Tanmoy Modak

备注：: 25 pages, 10 figures, brief review to appear in MPLA

摘要：

$h(125)$玻色子是在2012年才发现的，它的质量低于顶夸克，因此$t \to ch$的搜寻工作随即开始，目前的极限是千分之一，而且还在不断改进。由于$t \to ch$速率随$h$ - $H$混合角$\cosγ\to 0$的增大而减小，我们简要回顾了对奇异$CP$ -偶/奇Higgs玻色子$H/A$的顶变$tcH/tcA$耦合$ρ_{tc}$的对撞机探测.再加上额外的顶守恒$ttH/ttA$耦合$ρ_{tt}$，人们就有了增强的$cbH^+$耦合，以及熟悉的$tbH^+$耦合，其中$H^+$是带电的希格斯玻色子。我们提倡的主要流程是$cg \to tH/A \to tt\bar c,\; tt\bar t$（同号顶和三重顶）和$cg \to bH^+ \to bt\bar b$。我们还讨论了一些相关的过程如$cg \to thh$，$tZH$，它们依赖于$\cosγ$的非零性，简要地评论了$gg \to H/A \to t\bar t, t\bar c$共振产生，并涉及到$ρ_{tu}$耦合.

英文摘要：

The $h(125)$ boson, discovered only in 2012, is lower than the top quark in mass, hence $t \to ch$ search commenced immediately thereafter, with current limits at the per mille level and improving. As the $t \to ch$ rate vanishes with the $h$-$H$ mixing angle $\cosγ\to 0$, we briefly review the collider probes of the top changing $tcH/tcA$ coupling $ρ_{tc}$ of the exotic $CP$-even/odd Higgs bosons $H/A$. Together with an extra top conserving $ttH/ttA$ coupling $ρ_{tt}$, one has an enhanced $cbH^+$ coupling alongside the familiar $tbH^+$ coupling, where $H^+$ is the charged Higgs boson. The main processes we advocate are $cg \to tH/A \to tt\bar c,\; tt\bar t$ (same-sign top and triple-top), and $cg \to bH^+ \to bt\bar b$. We also discuss some related processes such as $cg \to thh$, $tZH$ that depend on $\cosγ$ being nonzero, comment briefly on $gg \to H/A \to t\bar t, t\bar c$ resonant production, and touch upon the $ρ_{tu}$ coupling.

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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