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

Abstract

This paper reports the first measurement of the effective B_s^0 -> J/ψ 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/ψK_S^0 = 1.75 +/- 0.12 (stat) +/- 0.07 (syst) and BR(B_s^0 -> J/ψ K_S^0) = (1.97 +/- 0.23) X 10^{-5}. For the latter measurement, the uncertainty includes both statistical and systematic sources.

6+15 pages, 4 figures, matches version published in Nucl. Phys. B

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Cited by in corpus (14)

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• Measurement of the time-dependent CP asymmetries in $B_s^0\to J/\psi K_{\mathrm{S}}^0$
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