标题： 中微子非标准相互作用和通过奇夸克产生在SND@LHC下轻子味普遍性破坏 显示英文标题

标题： Neutrino Nonstandard Interactions and Lepton Flavor Universality violation at SND@LHC via charm production

摘要： 在本工作中，我们探讨了涉及奇夸克的中微子非标准相互作用（NSI）在SND@LHC中的影响。 使用涉及奇夸克的四费米子算符对新物理的有效描述，我们从二体和三体奇夸克介子衰变中限制了有效相互作用的威尔逊系数。 在我们的拟合中，我们不仅包括奇夸克介子衰变到伪标量末态，还包括衰变到矢量末态以及衰变到$\eta$和$\eta^\prime$末态。 我们还考虑了奇夸克重子衰变的约束。 然后，我们研究了在不同基准新物理耦合下，新物理在中微子散射过程中的影响，这些基准新物理耦合来自于低能拟合。 最后，我们还研究了轻子普适性破坏（LUV）的影响，假设新物理耦合不是轻子普适的。 显示英文摘要

摘要： In this work, we explore the effect of neutrino nonstandard interactions (NSI) involving the charm quark at SND@LHC. Using an effective description of new physics in terms of four-fermion operators involving a charm quark, we constrain the Wilson coefficients of the effective interaction from two and three-body charmed meson decays. In our fit, we include charmed meson decays not only to pseudoscalar final states but also to vector final states and include decays to the $\eta$ and $\eta^\prime$ final states. We also consider constraints from charmed baryon decays. We then study the effect of new physics in neutrino scattering processes, involving charm production at SND@LHC, for various benchmark new physics couplings obtained from the low energy fits. Finally, we also study the effects of lepton universality violation (LUV) assuming that the new physics coupling is not lepton universal.