Measurement of the ratio of $B_c^{+}$ branching fractions to $J/\psi {\pi }^{+}$ and $J/\psi {\mu }^{+}{\nu }_{\mu }$

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, $\mathcal{B}(B_c^{+}\to J/\psi {\pi }^{+})/\mathcal{B}(B_c^{+}\to J/\psi {\mu }^{+}{\nu }_{\mu })=0.0469\pm 0.0028(stat.)\pm 0.0046(syst.)$, is at the lower end of available theoretical predictions.

20 pages, 4 figures

References in corpus (9)

• PYTHIA 6.4 Physics and Manual
• Performance of the LHCb Vertex Locator
• Exclusive semileptonic and nonleptonic decays of the Bc meson
• Study of exclusive semileptonic and nonleptonic decays of $B_c^{-}$ in a nonrelativistic quark model
• Measurement of the Bc meson mass in the exclusive decay Bc --> Jpsi Pi
• Measurement of the lifetime of the B_c meson in the semileptonic decay channel
• Measurement of the $B_c^{-}$ meson lifetime in the decay $B_c^{-}\to J/\psi {\pi }^{-}$
• Evidence for the decay $B_c^{+}\to J/\psi 3{\pi }^{+}2{\pi }^{-}$
• Exclusive Decays and Lifetime of B_c Meson in QCD sum rules

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