Absolute branching fractions of Cabibbo-suppressedD→KK¯decays

Publisher Website

28 May 2008

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

Vol. 77 (9) , 091106
https://doi.org/10.1103/physrevd.77.091106

Abstract

Using

281 {pb}^{- 1}

of data collected with the CLEO-c detector at the

ψ (3770)

resonance, we have studied Cabibbo-suppressed decays of

D

mesons to final states with two kaons. We present results for the absolute branching fractions of the modes

D^{0} \to K^{+} K^{-}

,

D^{0} \to K_{S}^{0} K_{S}^{0}

, and

D^{+} \to K^{+} K_{S}^{0}

. We measure

B (D^{0} \to K^{+} K^{-}) = (4.08 \pm 0.08 \pm 0.09) \times 10^{- 3}

,

B (D^{0} \to K_{S}^{0} K_{S}^{0}) = (1.46 \pm 0.32 \pm 0.09) \times 10^{- 4}

, and

B (D^{+} \to K^{+} K_{S}^{0}) = (3.14 \pm 0.09 \pm 0.08) \times 10^{- 3}

. We also determine the ratio

B (D^{0} \to K^{+} K^{-}) / B (D^{0} \to π^{+} π^{-}) = 2.89 \pm 0.05 \pm 0.06

. For each measurement, the first uncertainty is statistical and the second uncertainty is systematic.

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