Measurement of the relative branching ratio of ${B}_{s}^{0}\ensuremath{\rightarrow}J/\ensuremath{\psi}{f}_{0}(980)$ to ${B}_{s}^{0}\ensuremath{\rightarrow}J/\ensuremath{\psi}\ensuremath{\phi}$

Rapid Communication

Measurement of the relative branching ratio of $B_{s}^{0} \to J / ψ f_{0} (980)$ to $B_{s}^{0} \to J / ψ ϕ$

V. M. Abazov et al. (The D0 Collaboration)

Phys. Rev. D 85, 011103(R) – Published 20 January 2012

Abstract

We present a measurement of the relative branching fraction, $R_{f_{0} / ϕ}$ , of $B_{s}^{0} \to J / ψ f_{0} (980)$ , with $f_{0} (980) \to π^{+} π^{-}$ , to the process $B_{s}^{0} \to J / ψ ϕ$ , with $ϕ \to K^{+} K^{-}$ . The $J / ψ f_{0} (980)$ final state corresponds to a $C P$ -odd eigenstate of $B_{s}^{0}$ that could be of interest in future studies of $C P$ violation. Using $8 {fb}^{- 1}$ of data recorded with the D0 detector at the Fermilab Tevatron Collider, we find $R_{f_{0} / ϕ} = 0.275 \pm 0.041 (stat) \pm 0.061 (syst)$ .