arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2008.02573hep-phhep-ex
收藏

约束$t \to u$在LHC上改变中性Higgs耦合的味道

Constraining $t \to u$ flavor changing neutral Higgs coupling at the LHC

Wei-Shu Hou, Ting-Hsiang Hsu, Tanmoy Modak

摘要:

我们研究了$t\to u$变味中性希格斯(FCNH)耦合的限制,以及如何在大型强子对撞机(LHC)上进一步探索。在一般的双Higgs模型中,这种跃迁可以由非零的$ρ_{tu}$ Yukawa耦合引起。我们表明,这种耦合可以受到现有的搜索在大型强子对撞机的$m_H$,$m_A$和,$m_{H^+}$在子TeV范围内,其中$H$,$A$和$H^+$是外来的$CP$ -偶,$CP$ -奇和带电标量。我们发现,一个专门的$ug\to t H/tA \to t t \bar u$搜索可以探测$ρ_{tu}$的可用参数空间下降到百分之几的水平为$200\,\mbox{GeV} \lesssim m_H,\,m_A \lesssim 600$ GeV,发现可能在高光度。如何其他额外的顶部汤川耦合,如$ρ_{tc}$和$ρ_{tt}$,稀释的$ρ_{tu}$探针的灵敏度的影响进行了讨论。

英文摘要:

We study the constraints on $t\to u$ flavor changing neutral Higgs (FCNH) coupling, and how it may be explored further at the Large Hadron Collider (LHC). In the general two Higgs doublet model, such transitions can be induced by a nonzero $ρ_{tu}$ Yukawa coupling. We show that such couplings can be constrained by existing searches at the LHC for $m_H$, $m_A$ and, $m_{H^+}$ in the sub-TeV range, where $H$, $A$ and $H^+$ are the exotic $CP$-even, $CP$-odd and charged scalars. We find that a dedicated $ug\to t H/tA \to t t \bar u$ search can probe the available parameter space of $ρ_{tu}$ down to a few percent level for $200\,\mbox{GeV} \lesssim m_H,\,m_A \lesssim 600$ GeV, with discovery possible at high luminosity. Effects of how other extra top Yukawa couplings, such as $ρ_{tc}$ and $ρ_{tt}$, dilute the sensitivity of the $ρ_{tu}$ probe are discussed.

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。

↑