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

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9 December 2008

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

Vol. 101 (24) , 241801
https://doi.org/10.1103/physrevlett.101.241801

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.

Keywords

PHYSICAL SCIENCES

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Version 1, 2008-02-15, ArXiv

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