论文标题
Majorana介导的B衰变的角度和极化可观察到有效相互作用
Angular and polarization observables for Majorana-mediated B decays with effective interactions
论文作者
论文摘要
我们使用角度和极化可观察到的，在B膜腐烂和Lepton Colliders的B Meson衰变中使用无菌中微子扩展了标准模型的有效野外理论。我们对以其独特的狄拉克 - 洛伦兹结构为特征的不同有效的操作员进行了界限，并探测了$ n $介导的B衰变对这些相互作用的敏感性。我们定义了前向后的不对称$ a_ {fb}^{\ ellγ} $之间的muon和光子指示，用于$ b \ toμνγ$衰减，这使我们能够将SM的贡献与有效的Lepton数量巩固和违反过程分开，并由接近shell $ shell $ n $ n $ n $ n $ n $ n。 Using the most stringent constraints on the effective parameter space from Belle and BaBar we find that a measurement of the final polarization $P_τ$ in the rare $B^-\rightarrow \ell^-_{1}\ell^-_{2} π^+$ decays can help us infer the scalar or vector interaction content in the $N$ production or decay vertices.我们发现B介子衰变对标量运算符更敏感。
We probe the effective field theory extending the Standard Model with a sterile neutrino in B meson decays at B factories and lepton colliders, using angular and polarization observables. We put bounds on different effective operators characterized by their distinct Dirac-Lorentz structure, and probe the $N$-mediated B decays sensitivity to these interactions. We define a Forward-Backward asymmetry $A_{FB}^{\ell γ}$ between the muon and photon directions for the $B \to μνγ$ decay, which allows us to separate the SM contribution from the effective lepton number conserving and violating processes, mediated by a near on-shell $N$. Using the most stringent constraints on the effective parameter space from Belle and BaBar we find that a measurement of the final polarization $P_τ$ in the rare $B^-\rightarrow \ell^-_{1}\ell^-_{2} π^+$ decays can help us infer the scalar or vector interaction content in the $N$ production or decay vertices. We find that the B meson decays are more sensitive to scalar operators.
