National Natural Science Foundation of China [12135006, 12075097]; Fundamental Research Funds for the Central Universities [CCNU20TS007, CCNU19TD012, 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：
The semitauonic
$$ {B}_c^{-}\to J/\psi {\tau}^{-}{\overline{\nu}}_{\tau } $$
decay provides an ideal and clean mode to scrutinize possible new physics effects in
$$ b\to c{\tau}^{-}{\overline{\nu}}_{\tau } $$
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
$$ {B}_c^{-}\to J/\psi {\tau}^{-}{\overline{\nu}}_{\tau } $$
decay with both polarized τ lepton and J/ψ meson. Their subsequ...
