Anomalies in(semi)-leptonic B decays B~±→τ~±ν,B~±→Dτ~±ν and B~±→D~*τ~±ν,and possible resolution with sterile neutrino

作     者：Gorazd Cveti Francis Halzen C.S.Kim Sechul Oh 

作者机构：Department of PhysicsUniversidad Tcnica Federico Santa María Wisconsin Ice Cube Particle Astrophysics Center and Department of PhysicsUniversity of Wisconsin Department of Physics and IPAPYonsei University University CollegeYonsei University 

出 版 物：《Chinese Physics C》 (中国物理C（英文版）)

年 卷 期：2017年第41卷第11期

页      面：14-27页

核心收录：

学科分类：07[理学] 070202[理学-粒子物理与原子核物理] 0702[理学-物理学] 

基　　金：support by FONDECYT(Chile)(1130599) supported in part by the NRF grant funded by the Korean government of the MEST(2016R1D1A1A02936965) 

主　　题：sterile neutrino lepton universality semileptonic B decays 

摘      要：The universality of the weak interactions can be tested in semileptonic b→c transitions,and in particular in the ratios R（D＊） ≡ Γ（B → D（＊）τν）/Γ（B → D＊lν）（where 1 = μ or e）.Due to the recent differences between the experimental measurements of these observables by Ba Bar,Belle and LHCb on the one hand and the Standard Model predicted values on the other hand,we study the predicted ratios R（D＊）=Γ（B→D＊τ＋＂missing＂）/Γ（B→D（＊）lν）in scenarios with an additional sterile heavy neutrino of mass ～1 Ge ***,we evaluate the newly defined ratio R（0）≡Γ（B→τ＋＂missing＂）/Γ（B→μν） in such scenarios,in view of the future possibilities of measuring the quantity at Belle-Ⅱ.