A unified phenomenological study computes the B_c meson spectrum in a screened potential model and applies the results in QCD sum rules for weak decays after updating heavy-quark masses and refitting normalization.
Measurement of the ratio of $B_c^+$ branching fractions to $J/\psi\pi^+$ and $J/\psi\mu^+\nu_\mu$
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abstract
The first measurement that relates semileptonic and hadronic decay rates of the $B_c^+$ meson is performed using proton-proton collision data corresponding to 1.0 fb$^{-1}$ of integrated luminosity collected with the LHCb detector. The measured value of the ratio of branching fractions, ${\cal B}(B_c^+ \to J/\psi \pi^+)/{\cal B}(B_c^+\to J/\psi\mu^+\nu_\mu)=0.0469 \pm 0.0028 (stat.) \pm 0.0046 (syst.)$, is at the lower end of available theoretical predictions.
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A unified study of the \(B_c\) meson: from spectrum and form factors to weak and radiative decays
A unified phenomenological study computes the B_c meson spectrum in a screened potential model and applies the results in QCD sum rules for weak decays after updating heavy-quark masses and refitting normalization.