We present a measurement of the ratio of the Bs⁰ meson lifetime, in the flavor-specific decay to Ds⁺pi⁻, to that of the B⁰ meson. The pp collision data used correspond to an integrated luminosity of 1fb(-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 B⁰ lifetime, we determine the flavor-specific Bs⁰ lifetime to be tau(Bs⁰ )=1.535±0.015±0.014ps, 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.

Measurement of the Bs⁰ meson lifetime in Ds⁺pi⁻ decays

CENCI, RICCARDO;MARINO, PIETRO;MORELLO, MICHAEL JOSEPH;
2014

Abstract

We present a measurement of the ratio of the Bs⁰ meson lifetime, in the flavor-specific decay to Ds⁺pi⁻, to that of the B⁰ meson. The pp collision data used correspond to an integrated luminosity of 1fb(-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 B⁰ lifetime, we determine the flavor-specific Bs⁰ lifetime to be tau(Bs⁰ )=1.535±0.015±0.014ps, 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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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11384/59622
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