异常规范耦合vis- $\grave{a}$ -vis $(g-2)_μ$和味观测值
Anomalous gauge couplings vis-$\grave{a}$-vis $(g-2)_μ$ and flavor observables
摘要:
根据FNAL最近的$(g-2)_μ$测量结果、$(g-2)_μ$的晶格理论新结果和几个$B$衰变模的最新测量结果,我们重新评估了非标准三重规范耦合。在SMEFT的框架中,调用三个玻色子6维算子来参数化超出标准模型的物理学,并计算它们对此类低能可观测量的贡献。相应的威尔逊系数的约束,然后来自拟合到当前的实验界限上的观测值和比较最严格的可从13 TeV的大型强子对撞机数据中的$W^+ W^-$和$W^\pm Z$生产渠道。
英文摘要:
We reassess non-standard triple gauge couplings in the light of the recent $(g-2)_μ$ measurement at FNAL, the new lattice theory result of $(g-2)_μ$ and the updated measurements of several $B$-decay modes. In the framework of SMEFT, three bosonic dimension-6 operators are invoked to parametrize physics beyond the Standard Model and their contributions to such low-energy observables computed. Constraints on the corresponding Wilson coefficients are then derived from fits to the current experimental bounds on the observables and compared with the most stringent ones available from the 13 TeV LHC data in the $W^+ W^-$ and $W^\pm Z$ production channels.
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