论文标题
在与无菌中微子的一般中微子相互作用中，对带电电流的限制
Constraints on the charged currents in general neutrino interactions with sterile neutrinos
论文作者
论文摘要
在这项工作中，我们研究了低能精度测量对有效野外理论中无菌中微子的一般中微子相互作用中夸克 - 莱普顿电流的含义。低能测量中的物理学是通过定义的无菌中微子（LNEFT）扩展的低能量有效场理论来描述的。我们还考虑了运行的重新归一化组，并将LNEFT与无菌中微子（SMNEFT）匹配到标准模型（SM）有效野外理论，以将新物理（NP）限制在Electroweak量表以上。最敏感的低能量探针是从精确的衰减分支分支，Lepton风味普遍性和Cabibbo-Kobayashi-Maskawa（CKM）单位性的。我们还考虑了包括核β衰变在内的其他限制因素。对电荷电流运营商的限制通常比夸克中性电流运算符的限制更强大。我们发现，Smneft中Lepton-number-number-Conserving和Lepton-number-violating Operators的NP量表中最严格的界限分别为74（110）TEV和9.8（13）TEV，对于带有（奇怪）夸克的操作员。
In this work we investigate the implication of low-energy precision measurements on the quark-lepton charged currents in general neutrino interactions with sterile neutrinos in effective field theories. The physics in low-energy measurements is described by the low-energy effective field theory extended with sterile neutrinos (LNEFT) defined below the electroweak scale. We also take into account renormalization group running and match the LNEFT onto the Standard Model (SM) effective field theory with sterile neutrinos (SMNEFT) to constrain new physics (NP) above the electroweak scale. The most sensitive low-energy probes are from leptonic decays of pseudoscalar mesons and hadronic tau lepton decays in terms of precise decay branching fractions, the lepton flavor universality and the Cabibbo-Kobayashi-Maskawa (CKM) unitarity. We also consider other constraints including nuclear beta decay. The constraints on charged current operators are generally stronger than the ones for quark-neutrino neutral current operators. We find that the most stringent bounds on the NP scale of lepton-number-conserving and lepton-number-violating operators in SMNEFT are 74 (110) TeV and 9.8 (13) TeV, respectively, for the operators with down (strange) quark.
