Measurement of the effective B_s^0 -> J/ψ K_S^0 lifetime

R. Aaij, J.F.J. van den Brand, F. Dettori, T.J. Ketel, R. Koopman, R.W. Lambert, D. Martinez-Santos, M.H.M. Merk, H.G. Raven, M. Schiller, V. Syropoulos, S. Tolk, Collaboration LHCb

Research output: Contribution to JournalArticleAcademicpeer-review

Abstract

This paper reports the first measurement of the effective B0<inf>s</inf> →J/ψK0<inf>S</inf> lifetime and an updated measurement of its time-integrated branching fraction. Both measurements are performed with a data sample, corresponding to an integrated luminosity of 1.0 fb-1 of pp collisions, recorded by the LHCb experiment in 2011 at a centre-of-mass energy of 7 TeV. The results are: τ eff<inf>J/ψK0S</inf> = 1.75±0.12 (stat)±0.07 (syst) ps and B(B0<inf>S</inf> →J/ψK0<inf>S</inf>) = (1.97 ± 0.23) × 10-5. For the latter measurement, the uncertainty includes both statistical and systematic sources. © 2013 CERN. Published by Elsevier B.V.
Original languageEnglish
Pages (from-to)275-292
JournalNuclear Physics B
Volume873
Issue number2
DOIs
Publication statusPublished - 2013

Bibliographical note

Aaij:2013eia

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