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arXiv 2311.09488hep-ph
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μ子对撞机上的顶夸克味改变耦合

Top quark flavor changing couplings at a muon collider

Daniel Ake, Antonio O. Bouzas, F. Larios

AI总结:

本文研究μ子对撞机上通过味改变产生过程探测SMEFT中顶夸克味改变耦合的潜力,发现四费米子算符的极限可比LHC强三到四个数量级,并对张量算符 $Q_{uW}$ 和 $Q_{uB}$ 获得最高灵敏度。

摘要:

人们对开发μ子对撞机的兴趣日益增长,这种对撞机将使得在数个TeV能量下产生轻子碰撞成为可能。其中,它可能对电弱规范玻色子、希格斯玻色子和顶夸克物理产生显著贡献。在这项工作中,我们关注后者,特别是有效的味改变(FC)顶夸克相互作用。我们讨论了味改变 $t \ar q$($q=u,c$)产生过程,这些过程可以很好地探测SMEFT中维度六的顶夸克四费米子和费米子-玻色子算符。我们考虑了所有十六个能够产生味改变顶夸克耦合的算符。在与当前LHC界限进行比较后,我们发现对于四费米子算符,潜在的极限要强三到四个数量级。关于费米子-玻色子耦合,对于张量算符 $Q_{uW}$ 和 $Q_{uB}$,我们获得了最高的灵敏度。我们还观察到,有效 $W$ 近似(EWA)不适用于 $Q_{uB}$。

英文摘要:

There is growing interest in the development of a muon collider that would make it possible to produce lepton collisions at energies of several TeV. Among others, there can be significant contributions to electroweak gauge boson, Higgs boson and top quark physics. In this work we pay attention to the latter, in particular, effective flavor-changing (FC) top-quark interactions. We discuss the flavor changing $t \bar q$ ($q=u,c$) production processes that can be a good probe of the dimension-six top quark four-fermion and fermion-boson operators in the SMEFT. We consider all sixteen operators that can generate flavor-changing top quark couplings. After comparing with the current LHC bounds, we find potential limits three or four orders of magnitude stronger for four-fermion operators. Concerning fermion-boson couplings, for the tensor operators $Q_{uW}$ and $Q_{uB}$ we obtain the highest sensitivity. We also observe that the effective $W$ approximation (EWA) does not apply with $Q_{uB}$.

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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