arxiv: 1401.6932 · v1 · ★pith:FVYJFIQZnew · submitted 2014-01-27 · ✦ hep-ex
Measurement of the B_c^+ meson lifetime using B_c^+ to J\!/\!psiμ^+ ν_(μ) X decays
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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 $2\mathrm{~fb^{-1}}$, are collected by the LHCb detector in $pp$ collisions at a centre-of-mass energy of $8\,\mathrm{TeV}$. The measured lifetime is $$\tau = 509 \pm 8 \pm 12 \mathrm{~fs},$$ where the first uncertainty is statistical and the second is systematic.
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