Measurement of the ratio ofBc+branching fractions toJ/ψπ+andJ/ψμ+νμfinal states

R. Aaij, B. Adeva, M. Adinolfi, A. Affolder, Z. Ajaltouni, S. Akar, J. Albrecht, F. Alessio, M. Alexander, S. Ali, G. Alkhazov, P. Alvarez Cartelle (+689 others)
2014 Physical Review D  
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, B(B_c^+ → J/ψπ^+)/ B(B_c^+→ J/ψμ^+ν_μ)=0.0469 ± 0.0028 (stat.) ± 0.0046 (syst.), is at the lower end of available theoretical predictions.
doi:10.1103/physrevd.90.032009 fatcat:ks2hwzbmkbbg3odauehzlrafdm