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+c→J/ψπ+)/(B+c→J/ψμ+νμ)=0.0469±0.0028(stat.)±0.0046(syst.), is at the lower end of available theoretical predictions.
Measurement of the ratio of B+c branching fractions to J/ψπ+ and J/ψμ+νμ
ANDREOTTI, Mirco;BALDINI, Wander;BOZZI, Concezio;CALABRESE, Roberto;CORVO, Marco;FIORE, Marco;FIORINI, Massimiliano;LUPPI, Eleonora;SAVRIE', Mauro;TELLARINI, Giulia;TOMASSETTI, Luca;
2014
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, (B+c→J/ψπ+)/(B+c→J/ψμ+νμ)=0.0469±0.0028(stat.)±0.0046(syst.), is at the lower end of available theoretical predictions.File in questo prodotto:
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