Observation of the decay $B_{s}^{0}$ →J/ψ φ inp¯pcollisions at √s=1.8 TeV

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13 September 1993

journal article
research article
Published by American Physical Society (APS) in Physical Review Letters

Vol. 71 (11) , 1685-1689
https://doi.org/10.1103/physrevlett.71.1685

Abstract

This Letter reports the observation and mass measurement of fully reconstructed

B_{s}^{0}

mesons through the decay chain

B_{s}^{0}

→J/ψ ψ, J/ψ→

μ^{+}

μ^{-}

, φ→

K^{+}

K^{-}

using data obtained at the Collider Detector at Fermilab in p¯p collisions at √s =1.8 TeV. A signal of 14.0±4.7 events is observed. Comparison of the

B_{s}^{0}

signal with the kinematically similar decays

B^{+}

→J/ψ

K^{+}

and

B^{0}

→J/ψ

K^{*}

(892

)^{0}

is presented. The mass of the

B_{s}^{0}

meson is determined to be 5383.3±4.5(stat)±5.0(syst) MeV/

c^{2}

.

Keywords

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