论文标题
对$λ_b\toλ^*_cτ\barν_τ$衰减的新物理效果
New physics effects on $Λ_b\to Λ^*_cτ\barν_τ$ decays
论文作者
论文摘要
我们从最近的晶格确定$λ_b\ toλ^*_ c（2595）τ\barν_τ$和$λ^*_ c（2625）τ\barν_barν_τ$ semileptonic衰减以研究这些两种反应中的作用，否则，我们受益于$λ_b\ \toλ^*_ c（2595）τ\barν_τ$和$λ^*_ C（2625）τ$和$λ^*_ c（2625）τ$ contractication afration confiration confiration contripational，我们受益于研究两种反应，从而研究了两种反应，我们受益于lepton Reactional，否使用有效的理论方法，我们分析了可以通过Tau衰减中产生的带电颗粒的可见运动学访问的不同可观察物，为此，我们考虑$π^-ν_τ，ρ^-ν_τ$和$μ^ - \ \barν_μmν_V_τ$ Channels。我们比较了在标准模型和其他包含新物理（NP）相互作用的方案中获得的结果，以及左撇子或右中微子操作员。我们在模型之间找到了与$λ_b\toλ_c$衰减相似的模型之间的区分功能，尽管在这种情况下，$λ_b\toλ_b\toλ^*_ c $ lattice形式的较大错误在某种程度上受到了阻碍。尽管如此，当这些反应的分析已经能够区分某些NP方案，而当更精确的形式可用时，其潜力肯定会提高。
We benefit from a recent lattice determination of the full set of vector, axial and tensor form factors for the $Λ_b\to Λ^*_c(2595)τ\barν_τ$ and $Λ^*_c(2625)τ\barν_τ$ semileptonic decays to study the possible role of these two reactions in lepton flavor universality violation studies. Using an effective theory approach, we analyze different observables that can be accessed through the visible kinematics of the charged particles produced in the tau decay, for which we consider the $π^-ν_τ,ρ^-ν_τ$ and $μ^-\barν_μν_τ$ channels. We compare the results obtained in the Standard Model and other schemes containing new physics (NP) interactions, with either left-handed or right-handed neutrino operators. We find a discriminating power between models similar to the one of the $Λ_b\to Λ_c$ decay, although somewhat hindered in this case by the larger errors of the $Λ_b\toΛ^*_c$ lattice form factors. Notwithstanding this, the analysis of these reactions is already able to discriminate between some of the NP scenarios and its potentiality will certainly improve when more precise form factors are available.
