Phys. Rev. D 65, 092001 (2002) [8 pages]

Lifetime differences, direct CP violation, and partial widths in D⁰ meson decays to K⁺K^- and π⁺π^-

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S. E. Csorna et al. (CLEO Collaboration)
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Received 6 November 2001; published 18 April 2002

We describe several measurements using the decays D⁰→K⁺K^- and π⁺π^-. We find the ratio of partial widths, Γ(D⁰→K⁺K^-)/Γ(D⁰→π⁺π^-), to be 2.96±0.16±0.15, where the first error is statistical and the second is systematic. We observe no evidence for direct CP violation, obtaining A_CP(KK)=(0.0±2.2±0.8)% and A_CP(ππ)=(1.9±3.2±0.8)%. In the limit of no CP violation we measure the mixing parameter y_CP=-0.012±0.025±0.014 by measuring the lifetime difference between D⁰→K⁺K^- or π⁺π^- and the CP neutral state, D⁰→K^-π⁺. We see no evidence for mixing.

URL:

http://link.aps.org/doi/10.1103/PhysRevD.65.092001

DOI:

10.1103/PhysRevD.65.092001

PACS:

13.25.Ft

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Phys. Rev. D 65, 092001 (2002) [8 pages]

Lifetime differences, direct CP violation, and partial widths in D0 meson decays to K+K- and π+π-

Lifetime differences, direct CP violation, and partial widths in D⁰ meson decays to K⁺K^- and π⁺π^-