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.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
