Two-Body B Meson Decays to η and η′: Observation of B→η′K

Authors

B. H. Behrens, University of Colorado - Boulder
Kenneth A. Bloom, University of Nebraska-LincolnFollow
CLEO Collaboration

Date of this Version

4-27-1998

Comments

Published by American Physical Society. Phys. Rev. Lett. 80, 3710 (1998). http://prl.aps.org. Copyright © 1998 American Physical Society. Permission to use.

Abstract

In a sample of 6.6 X 10⁶ produced B mesons we have observed decays B → η′K, with branching fractions Ɓ(B⁺ → η′K) = 6.5_-1.4^+1.5± 0.9) X 10^-5 and Ɓ(B⁰ → η′K⁰) = 4.7_-2.0^+2.7 ± 0.9) X 10^-5. We have searched with comparable sensitivity for 17 related decays to final states containing an η or η′ meson accompanied by a single particle or low-lying resonance. Our upper limits for these constrain theoretical interpretations of the B → η′K _signal.