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ISSN - 00319007, EISSN - 10797114, Physical Review Letters, 2012, vol. 108, p. -

Search for CP violation in D ± meson decays to π ±

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

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 -π ± and the Cabibbo-favored decays Ds±→K +K -π ± in the K +K - mass region of the resonance. Using 955fb -1 of data collected with the Belle detector, we obtain ACPD +→π +=(+0.51±0.28±0.05)%. The measurement improves the sensitivity of previous searches by more than a factor of 5. We find no evidence for direct CP violation. © 2012 American Physical Society.