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Measurement of the ¯B0s Meson Lifetime in D+sπ− Decays

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We present a measurement of the ratio of the ¯ B 0 s meson lifetime, in the flavor-specific decay to D + s π − , to that of the ¯ B 0 meson. The p p collision data used correspond to an integrated luminosity of 1     fb − 1 , collected with the LHCb detector, at a center-of-mass energy of 7 TeV. Combining our measured value of 1.010 ± 0.010 ± 0.008 for this ratio with the known ¯ B 0 lifetime, we determine the flavor-specific ¯ B 0 s lifetime to be τ ( ¯ B 0 s ) = 1.535 ± 0.015 ± 0.014     ps , where the uncertainties are statistical and systematic, respectively. This is the most precise measurement to date, and is consistent with previous measurements and theoretical predictions.

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cc by (c) CERN; LHCb Collaboration, 2014

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Articles publicats en revistes (Física Quàntica i Astrofísica)

# metadata.dc.title[].value
Measurement of the ¯B0s Meson Lifetime in D+sπ− Decays