Measurement of the B[over ]_{s}^{0} Meson Lifetime in D_{s}^{+}pi^{-} Decays

R. Aaij, S. Ali, J.F.J. van den Brand, K. De Bruyn, C. Farinelli, V.A.M. Heijne, T.J. Ketel, R.F. Koopman, A. Kozlinskiy, J. van Leerdam, M.H.M. Merk, S. Oggero, A. Pellegrino, H.G. Raven, H. Snoek, V. Syropoulos, P.N.Y. David, S. Tolk, Collaboration LHCb

Research output: Contribution to JournalArticleAcademicpeer-review


We present a measurement of the ratio of the B[over ]_{s}^{0} meson lifetime, in the flavor-specific decay to D_{s}^{+}pi^{-}, to that of the B[over ]^{0} 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 7TeV. Combining our measured value of 1.010±0.010±0.008 for this ratio with the known B[over ]^{0} lifetime, we determine the flavor-specific B[over ]_{s}^{0} lifetime to be tau(B[over ]_{s}^{0})=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.
Original languageEnglish
Article number172001
JournalPhysical Review Letters
Issue number17
Publication statusPublished - 2014


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