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

The LHCb Collaboration, Matthew Needham, Franz Muheim, Peter Clarke, Yuehong Xie, Stephan Eisenhardt, Greig Cowan

Research output: Contribution to journalArticlepeer-review

Abstract / Description of output

This paper reports the first measurement of the effective B_s^0 -> J/{\psi} K_S^0 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: tau_J/{\psi}K_S^0 = 1.75 +/- 0.12 (stat) +/- 0.07 (syst) and BR(B_s^0 -> J/{\psi} K_S^0) = (1.97 +/- 0.23) X 10^{-5}. For the latter measurement, the uncertainty includes both statistical and systematic sources.
Original languageEnglish
Pages (from-to), pp. 275-292
JournalNuclear physics b
Early online date16 Apr 2013
Publication statusPublished - 11 Aug 2013


Dive into the research topics of 'Measurement of the effective B_s^0 -> J/psi K_S^0 lifetime'. Together they form a unique fingerprint.

Cite this