Measurement of ${B}_{s}^{0}$ Mixing Parameters from the Flavor-Tagged Decay ${B}_{s}^{0}\ensuremath{\rightarrow}J/\ensuremath{\psi}\ensuremath{\phi}$

Measurement of $B_{s}^{0}$ Mixing Parameters from the Flavor-Tagged Decay $B_{s}^{0} \to J / ψ ϕ$

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

Phys. Rev. Lett. 101, 241801 – Published 9 December 2008

Abstract

From an analysis of the flavor-tagged decay $B_{s}^{0} \to J / ψ ϕ$ we obtain the width difference between the $B_{s}^{0}$ light and heavy mass eigenstates, $Δ Γ_{s} = 0.19 \pm 0.07 (stat)_{- 0.01}^{+ 0.02} (syst) {ps}^{- 1}$ , and the $C P$ -violating phase, $ϕ_{s} = - {0.57}_{- 0.30}^{+ 0.24} (stat)_{- 0.02}^{+ 0.08} (syst)$ . The allowed 90% CL intervals of $Δ Γ_{s}$ and $ϕ_{s}$ are $0.06 < Δ Γ_{s} < 0.30 {ps}^{- 1}$ and $- 1.20 < ϕ_{s} < 0.06$ , respectively. The data sample corresponds to an integrated luminosity of $2.8 {fb}^{- 1}$ accumulated with the D0 detector at the Fermilab Tevatron collider.