论文标题
在FCC-HH上调查顶级HIGGS FCNC耦合
Investigating Top-Higgs FCNC Couplings at the FCC-hh
论文作者
论文摘要
我们已经研究了对在强子 - 二体碰撞模式（FCC-HH）中未来圆形对撞机上顶部和希格斯玻色子的风味变化中性当前相互作用的敏感性。我们的主要关注点是$ pp \ rightarrow th $（FCNC生产）和$ pp \ rightArrow t \ bar {t} $（一个顶级FCNC衰减）的流程，该过程对单个Lepton，至少有三个喷气机和最终状态中缺少的能量横向造成了贡献。一方面，FCC-HH为这些信号过程提供了非常高的光度和较大的横截面，另一方面，可以将需要应用巧妙方法应用的背景区分开。在这里，我们使用我们的分析路径启发并遵循了在LHC上进行的搜索，并在现象学上可能在可能的顶级HIGGS FCNC耦合上获得的可达到的极限。我们获得了新的限制，这些限制超出了从LHC处的不同通道和过程获得的当前实验限制。可以设置$ tqh $ fcnc交互的分支比率的潜在发现或排除限制，可以设置$ br（η_{uc}）_ {\ mathrm {disc}} = 9.08 \ times10 \ times10^{ - 6} $或$ br（η_{uc}）_ {\ mathrm {exc}} = 2.78 \ times10^{ - 6} $分别为30 ab $^{ - 1} $，分别为30 ab $^{ - 1} $。我们的结果与在FCC-HH上已经研究的其他渠道兼容。
We have studied the sensitivity to flavor changing neutral current interaction of top and Higgs boson at the future circular collider in the hadron-hadron collision mode (FCC-hh). Our main concerns are the processes of $pp\rightarrow th$ (FCNC production) and $pp\rightarrow t\bar{t}$ (one top FCNC decay) which contributes to the single lepton, at least three jets and the missing energy transverse in the final state. On the one hand FCC-hh offers very high luminosity and large cross section for these signal processes, on the other hand signal can be distinguished from background which needs application of ingenious methods. Here, we have inspired and followed the searches at the LHC using our analysis path and enhanced attainable limits obtained on the possible top-Higgs FCNC couplings phenomenologically. We obtain new limits which are beyond the current experimental limits obtained from different channels and processes at the LHC. The potential discovery or exclusion limits on branching ratios for $tqH$ FCNC interactions can be set $BR(η_{uc})_{\mathrm{disc}}=9.08\times10^{-6}$ or $BR(η_{uc})_{\mathrm{exc}}=2.78\times10^{-6}$ at an integrated luminosity of 30 ab$^{-1}$ , respectively. Our results are compatible with the other channels already studied at FCC-hh.
