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arXiv · 1110.0694

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

Belle Collaboration·M. Starič·H. Aihara·K. Arinstein·D. M. Asner·T. Aushev·A. M. Bakich·A. Bay·V. Bhardwaj·B. Bhuyan·A. Bozek·M. Bračko·T. E. Browder·A. Chen·P. Chen·B. G. Cheon·K. Chilikin·R. Chistov·I. -S. Cho·K. Cho·Y. Choi·Z. Doležal·Z. Drásal·S. Eidelman·J. E. Fast·V. Gaur·N. Gabyshev·B. Golob·J. Haba·K. Hayasaka·Y. Horii·Y. Hoshi·W. -S. Hou·Y. B. Hsiung·T. Iijima·K. Inami·A. Ishikawa·R. Itoh·M. Iwabuchi·Y. Iwasaki·T. Iwashita·T. Julius·J. H. Kang·T. Kawasaki·C. Kiesling·H. J. Kim·H. O. Kim·J. B. Kim·K. T. Kim·M. J. Kim·Y. J. Kim·K. Kinoshita·B. R. Ko·N. Kobayashi·S. Koblitz·P. Kodyš·S. Korpar·P. Križan·T. Kumita·Y. -J. Kwon·J. S. Lange·S. -H. Lee·J. Li·Y. Li·J. Libby·C. Liu·Z. Q. Liu·R. Louvot·S. McOnie·K. Miyabayashi·H. Miyata·Y. Miyazaki·G. B. Mohanty·E. Nakano·Z. Natkaniec·S. Nishida·O. Nitoh·T. Nozaki·T. Ohshima·S. Okuno·S. L. Olsen·G. Pakhlova·H. K. Park·K. S. Park·R. Pestotnik·M. Petrič·L. E. Piilonen·M. Röhrken·S. Ryu·H. Sahoo·K. Sakai·Y. Sakai·T. Sanuki·O. Schneider·C. Schwanda·A. J. Schwartz·O. Seon·M. E. Sevior·V. Shebalin·C. P. Shen
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Abstract

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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Belle Collaboration, M. Starič, H. Aihara, K. Arinstein, D. M. Asner, T. Aushev, A. M. Bakich, A. Bay, V. Bhardwaj, B. Bhuyan, A. Bozek, M. Bračko, T. E. Browder, A. Chen, P. Chen, B. G. Cheon, K. Chilikin, R. Chistov, I. -S. Cho, K. Cho, Y. Choi, Z. Doležal, Z. Drásal, S. Eidelman, J. E. Fast, V. Gaur, N. Gabyshev, B. Golob, J. Haba, K. Hayasaka, Y. Horii, Y. Hoshi, W. -S. Hou, Y. B. Hsiung, T. Iijima, K. Inami, A. Ishikawa, R. Itoh, M. Iwabuchi, Y. Iwasaki, T. Iwashita, T. Julius, J. H. Kang, T. Kawasaki, C. Kiesling, H. J. Kim, H. O. Kim, J. B. Kim, K. T. Kim, M. J. Kim, Y. J. Kim, K. Kinoshita, B. R. Ko, N. Kobayashi, S. Koblitz, P. Kodyš, S. Korpar, P. Križan, T. Kumita, Y. -J. Kwon, J. S. Lange, S. -H. Lee, J. Li, Y. Li, J. Libby, C. Liu, Z. Q. Liu, R. Louvot, S. McOnie, K. Miyabayashi, H. Miyata, Y. Miyazaki, G. B. Mohanty, E. Nakano, Z. Natkaniec, S. Nishida, O. Nitoh, T. Nozaki, T. Ohshima, S. Okuno, S. L. Olsen, G. Pakhlova, H. K. Park, K. S. Park, R. Pestotnik, M. Petrič, L. E. Piilonen, M. Röhrken, S. Ryu, H. Sahoo, K. Sakai, Y. Sakai, T. Sanuki, O. Schneider, C. Schwanda, A. J. Schwartz, O. Seon, M. E. Sevior, V. Shebalin, C. P. Shen. 2011-10-07. Search for CP Violation in D Meson Decays to phi pi+. https://doi.org/10.1103/physrevlett.108.071801

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