Measurement of the {B} _{c} ^+ meson lifetime using {B} _{c} ^+ \rightarrow {{J} /\psi } \mu ^+ \upnu _\mu X decays

The lifetime of the B-c(+) meson is measured using semileptonic decays having a J/psi meson and a muon in the final state. The data, corresponding to an integrated luminosity of 2 fb(-1), are collected by the LHCb detector in collisions at a centre-of-mass energy of 8 TeV. The measured lifetime is tau = 509 +/- 8 +/- 12 fs, where the firs...更多