PT Journal
AU LHCb Collaboration (Aaij, Rea
   Oyanguren, A
   Ruiz Valls, P
TI Measurement of the effective B-S(0) -> J/psi K-S(0) lifetime
SO Nuclear Physics B
JI Nucl. Phys. B
PY 2013
BP 275
EP 292
VL 873
IS 2
DI 10.1016/j.nuclphysb.2013.04.021
LA English
AB 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(eff)(J/psi KS0) = 1.75 +/- 0.12 (stat) +/- 0.07 (syst) ps and B(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.
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