标题： 矢量轻子夸克对轻子磁矩的贡献 显示英文标题

标题： Vector leptoquark contributions to lepton dipole moments

摘要： 轻子夸克（LQs）可以对带电轻子的磁和电偶极矩做出贡献，这些观测值目前实验已经以较高的精度进行了测量。 我们重新审视了对这些观测值有贡献的TeV尺度矢量轻子夸克的参数空间，并研究了这些模型如何应对大型强子对撞机（LHC）的限制。 我们表明，当有效利用当前的LHC数据时，参数空间的很大一部分被排除了。 我们发现只有$U_1$和$V_2$可以通过轻子手性翻转贡献与$\mathcal O(1)$LQ-夸克-轻子耦合来解释观察到的$(a_\mu^{\rm exp} - a_\mu^{\rm SM})$的正向偏移。 我们还看到这两个轻子夸克如何适应电子偶极矩和原子宇称破坏测量。 我们发现，目前的μ子电偶极矩测量无法将LQ-夸克-轻子耦合限制在微扰区域内。 显示英文摘要

摘要： Leptoquarks (LQs) can contribute to the magnetic and electric dipole moments of charged leptons, which the current experiments have measured with good accuracy. We revisit the parameter spaces of TeV-scale vector LQs that contribute to these observables and study how these models fare against the LHC bounds. We show that significant portions of the parameter space are excluded when the current LHC data is utilised effectively. We find that only $U_1$ and $V_2$ can explain the observed positive shift in $(a_\mu^{\rm exp} - a_\mu^{\rm SM})$ through a lepton chirality-flipping contribution with $\mathcal O(1)$ LQ-quark-lepton coupling. We also see how these two LQs can fit the electron dipole moment and atomic parity violation measurements. We find that the current electric dipole moment measurements of the muon cannot restrain the LQ-quark-lepton couplings within perturbative regions.