Study of the Decay B_s⁰ → D_s^(*)D_s^(*)

Authors

V. M. Abazov, Joint Institute for Nuclear Research, Dubna, Russia
Kenneth A. Bloom, University of Nebraska-LincolnFollow
Gregory R. Snow, University of Nebraska-LincolnFollow
D0 Collaboration

Document Type

Article

Date of this Version

12-14-2007

Comments

Published by American Physical Society. Phys. Rev. Lett. 99, 241801 (2007). http://prl.aps.org. Copyright © 2007 American Physical Society. Used by permission.

Abstract

We report a study of the decay B_s⁰ → D_s^(*)D_s^(*) using a data sample corresponding to 1.3 fb^-1 of integrated luminosity collected by the D0 experiment in 2002–2006 during run II of the Fermilab Tevatron collider. One D_s^(*) meson was partially reconstructed in the decay D_s→ φμν, and the other D_s^(*) meson was identified using the decay D_s→ φπ where no attempt was made to distinguish D_s and D_s^(*) states. For the branching fraction Br(B_s⁰ → D_s^(*)D_s^(*)) we obtain a 90% C.L. range [0.002; 0.080] and central value 0.039_-0.017^+0.019(stat) _-0.015^+0.016(syst). This was subsequently used to make the most precise estimate of the width difference ΔΓ_s^CP in the B_s⁰ - B&#;_s⁰ system: ΔΓ_s^CP/ Γ_s = 0.079_-0.035^+0.038(stat) _-0.030^+0.031(syst).