arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2007.02327hep-ph
收藏

类矢量夸克对夸克混合矩阵的约束

Constraints on the quark mixing matrix with vector-like quarks

Drona Vatsyayan, Anirban Kundu

摘要:

虽然大型强子对撞机上希格斯玻色子产生和衰变的数据几乎排除了第四代手征夸克的可能性,但类矢量夸克仍然是扩展标准模型费米子部分的可行选择。这样的扩展不遭受任何异常,并很容易通过来自斜电弱参数的约束。我们考虑这样的最小扩展与$SU(2)$单重态和二重态矢量类夸克,可以混合一个,或最多两个,标准模型夸克。对新的混合角和相位的约束从几个$ΔB = 1$和$ΔB = 2$过程中获得。

英文摘要:

While a chiral fourth generation of quarks is almost ruled out from the data on Higgs boson production and decay at the Large Hadron Collider, vector-like quarks are still a feasible option to extend the fermionic sector of the Standard Model. Such an extension does not suffer from any anomalies and easily passes the constraints coming from oblique electroweak parameters. We consider such minimal extensions with $SU(2)$ singlet and doublet vector-like quarks that may mix with one, or at the most two, of the Standard Model quarks. Constraints on the new mixing angles and phases are obtained from several $ΔB = 1$ and $ΔB = 2$ processes.

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。

↑