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arXiv · 1210.2366

Measurement of the $B_c^{-}$ meson lifetime in the decay $B_{c}^{-} \rightarrow J/ψ~π^{-}$

CDF Collaboration
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Abstract

The lifetime of the $B_c^{-}$ meson is measured using 272 exclusive $B_{c}^{-} \to J/ψ(\to μ^+μ^-) π^-$ decays reconstructed in data from proton-antiproton collisions corresponding to an integrated luminosity of 6.7 fb$^{-1}$ recorded by the CDF II detector at the Fermilab Tevatron. The lifetime of the $B_c^{-}$ meson is measured to be $τ$($B_c^{-}$) = 0.452 $\pm$ 0.048(stat) $\pm$ 0.027(syst) ps. This is the first measurement of the $B_c^{-}$ meson lifetime in a fully-reconstructed hadronic channel, and it agrees with previous results and has comparable precision.

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CDF Collaboration. 2013-01-03. Measurement of the $B_c^{-}$ meson lifetime in the decay $B_{c}^{-} \rightarrow J/ψ~π^{-}$. https://doi.org/10.1103/physrevd.87.011101

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