The baryonic decay Lambda_b -> Lambda_c(-> Lambda pi) tau nu provides an independent probe of the R(D(*)) anomalies, with (C_VL, C_SR) as the most favored new physics solution and observables like K_1c, K_2ss showing high sensitivity.
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pQCD calculations predict ~90% longitudinal polarization in B_c to J/psi or psi(2S) plus rho or K* mediated light meson pairs, with one branching ratio ratio matching LHCb at 2.67 vs 2.80.
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The Angular Observables of $\Lambda_b \to \Lambda_c(\to \Lambda^0 \pi^+) \, \tau^-(\to \pi^- \nu_\tau)\, \bar{\nu}_\tau$ within the Paradigm of FCCC Anomalies
The baryonic decay Lambda_b -> Lambda_c(-> Lambda pi) tau nu provides an independent probe of the R(D(*)) anomalies, with (C_VL, C_SR) as the most favored new physics solution and observables like K_1c, K_2ss showing high sensitivity.
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$B_c$ meson decays into $S$-wave charmonium plus light meson pairs in the perturbative QCD approach
pQCD calculations predict ~90% longitudinal polarization in B_c to J/psi or psi(2S) plus rho or K* mediated light meson pairs, with one branching ratio ratio matching LHCb at 2.67 vs 2.80.