论文标题
将$ t \限制在LHC上改变中性的Higgs耦合到u $ $ themake
Constraining $t \to u$ flavor changing neutral Higgs coupling at the LHC
论文作者
论文摘要
我们研究了$ t \ to u $ the to to u $ themage Nedual Higgs（FCNH）耦合的约束，以及如何在大型强子撞机（LHC）中进一步探索它。在一般的两个Higgs Doublet模型中，可以通过非零$ρ_{tu} $ Yukawa耦合来诱导此类过渡。我们表明，这种耦合可以通过LHC的现有搜索来限制$ m_h $，$ m_a $和，$ m_ {h^+} $在子TEV范围内，其中$ h $，$ a $ a $ a $ a $ a $ a $ a $ a $ a $ a $ h^+$是奇异的$ cp $ cp $ - 我们发现，专门的$ ug \ to t h/ta \ to t t t \ bar u $搜索可以探测$ρ_{tu} $的可用参数空间，以$ 200 \，\ mbox {gev} \ lyssim m_h，\，m_a \ simsim 600 $ geev，以发现的umin -lum lumin。其他额外顶级的Yukawa耦合（例如$ρ_{tc} $和$ρ_{tt} $）如何稀释$ρ_{tu} $ probe的灵敏度。
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.
