This work is supported by the National Natural Science Foundation of China under Grant Nos. 12135006 and 12075097, as well as by the Fundamental Research Funds for the Central Universities under Grant Nos. CCNU20TS007, CCNU19TD012 and CCNU22LJ004.
机构署名：
本校为第一且通讯机构
院系归属：
物理科学与技术学院
摘要：
Abstract
The semitauonic $$ {B}_c^{-}\to J/\psi {\tau}^{-}{\overline{\nu}}_{\tau } $$
B
c
−
→
J
/
ψ
τ
−
ν
¯
τ
decay provides an ideal and clean mode to scrutinize possible new physics effects in $$ b\to c{\tau}^{-}{\overline{\nu}}_{\tau } $$
b
→
c
τ
−
ν
¯
τ
transitions as indicated by the current data on R(D(*)) anomalies. In this work, we use the spin density matrix method to obtain the maximum information on the underlying physics of $$ {B}_c^{-}\to J/\psi {\tau}^{-}{\overline{\...
