Measurement of the Ratios of Branching Fractions Ɓ(B_s⁰ → D_s^-π⁺)/ Ɓ(B⁰ → D^- π⁺) and Ɓ(B⁺ →D⁰ π⁺)/ Ɓ(B⁰ → D^- π⁺)

Authors

• A. Abulencia, University of Illinois, Urbana
• Kenneth A. Bloom, University of Nebraska-LincolnFollow
• CDF Collaboration

Document Type

Article

Date of this Version

5-19-2006

Comments

Published by American Physical Society. Phys. Rev. Lett. 96, 191801 (2006). http://prl.aps.org. Copyright © 2006 American Physical Society. Permission to use.

Abstract

We report an observation of the decay B_s⁰ → D_s^-π⁺ in pp̅ collisions at √s = 1.96 TeV using 115 pb^-1 of data collected by the CDF II detector at the Fermilab Tevatron. We observe 83 ± 11(stat) B_s⁰ → D_s ^-π⁺ candidates, representing a large increase in statistics over previous measurements and the first observation of this decay at a pp̅ collider. We present the first measurement of the relative branching fraction Ɓ(B_s⁰ → D_s^-π⁺)/ Ɓ(B⁰ → D^- π⁺)= 1.32 ± 0.18(stat) ± 0.38(syst). We also measure Ɓ(B⁺ →D⁰ π⁺)/ Ɓ(B⁰ → D^- π⁺) = 1.97 ± 0.10(stat) ± 0:21(syst), which is consistent with previous measurements.