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Lifetime differences, direct CP violation, and partial widths in D-0 meson decays to K+K- and pi(+)pi(-)

Abstract:
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 ACP(KK)=(0.0±2.2±0.8)% and ACP(ππ)=(1.9±3.2±0.8)%. In the limit of no CP violation we measure the mixing parameter yCP=-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.
Publication status:
Published

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Publisher copy:
10.1103/PhysRevD.65.092001

Authors


Csorna, SE More by this author
McLean, KW More by this author
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Journal:
PHYSICAL REVIEW D
Volume:
65
Issue:
9
Pages:
920011-920018
Publication date:
2002-05-01
DOI:
EISSN:
1089-4918
ISSN:
0556-2821
URN:
uuid:ab174597-4789-4132-8fd4-72c3f0d6727b
Source identifiers:
808
Local pid:
pubs:808
Language:
English

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