Observation of the Doubly Cabibbo-Suppressed Decay Ds+K+K+π

B. R. Ko et al. (Belle Collaboration)
Phys. Rev. Lett. 102, 221802 – Published 5 June 2009

Abstract

We report the first observation of the doubly Cabibbo-suppressed decay Ds+K+K+π using 605fb1 of data collected with the Belle detector at the KEKB asymmetric-energy e+e collider. The branching ratio with respect to its Cabibbo-favored counterpart B(Ds+K+K+π)/B(Ds+K+Kπ+) is (0.229±0.028±0.012)%, where the first uncertainty is statistical and the second is systematic. We also report a significantly improved measurement of the doubly Cabibbo-suppressed decay D+K+π+π, with a branching ratio B(D+K+π+π)/B(D+Kπ+π+)=(0.569±0.018±0.014)%.

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  • Received 30 March 2009

DOI:https://doi.org/10.1103/PhysRevLett.102.221802

©2009 American Physical Society

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Vol. 102, Iss. 22 — 5 June 2009

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