Search for CP Violation in D Meson Decays to phi pi+

Details Search for CP Violation in D Meson Decays to phi pi+ Search for CP Violation in D Meson Decays to phi pi+

2011-10-04

arxiv.org/abs/1110.0694v2

Physics

High Energy Physics

High Energy Physics - Experiment

submitted to PRL

Scientific paper

We search for CP violation in Cabibbo-suppressed charged D meson decays by measuring the difference between the CP violating asymmetries for the Cabibbo-suppressed decays D+ -> K+K-pi+ and the Cabibbo-favored decays Ds -> K+K-pi+ in the K+K- mass region of the phi resonance. Using 955/fb of data collected with the Belle detector we obtain A_CP(D+ -> phi pi+) = (+0.51 +- 0.28 +- 0.05)%. The measurement improves the sensitivity of previous searches by more than a factor of five. We find no evidence for direct CP violation.

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