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ISSN - 00319007, EISSN - 10797114, Physical Review Letters, 2011, vol. 106, p. -

Search for CP violation in the decays D0→KS0P0

Ko B. R., Won E., Arinstein K., Aushev T., Bakich A. M., Balagura V., Barberio E., Belous K., Bhardwaj V., Bhuyan B., Bischofberger M., Bondar A., Bozek A., Bračko M., Brodzicka J., Browder T. E., Chen A., Chen P., Cheon B. G., Chiang C. C., Cho I. S., Cho K., Choi K. S., Choi S. K., Choi Y., Eidelman S., Epifanov D., Feindt M., Gabyshev N., Garmash A., Golob B., Ha H., Haba J., Hayashii H., Horii Y., Hoshi Y., Hou W. S., Hyun H. J., Iijima T., Inami K., Ishikawa A., Itoh R., Iwabuchi M., Iwashita T., Julius T., Kang J. H., Kawasaki T., Kiesling C., Kim H. O., Kim M. J., Kim Y. J., Kinoshita K., Kodẙ P., Korpar S., Krïan P., Kumar R., Kuzmin A., Kwon Y. J., Kyeong S. H., Lee M. J., Lee S. H., Liu C., Liventsev D., Louvot R., Matyja A., Miyabayashi K., Miyata H., Miyazaki Y., Mizuk R., Mohanty G. B., Mori T., Nakano E., Nakao M., Nishida S., Nishimura K., Nitoh O., Ogawa S., Ohshima T., Okuno S., Olsen S. L., Pakhlov P., Park C. W., Park H., Park H. K., Pestotnik R., Petrič M., Piilonen L. E.

We have searched for CP violation in the decays D0→KS0P0 where P0 denotes a neutral pseudoscalar meson that is either a π0, η, or η′ using KEKB asymmetric-energy e+e- collision data corresponding to an integrated luminosity of 791fb-1 collected with the Belle detector. No evidence of significant CP violation is observed. We report the most precise CP asymmetry measurement in the decay D0→KS0π0 to date: ACPD0→KS0π0=(-0.28±0.19±0.10)%. We also report the first measurements of CP asymmetries in the decays D0→KS0η and D0→KS0η′: ACPD0→KS0η= (+0.54±0.51±0.16)% and ACPD0→KS0η′=(+0. 98±0.67±0.14)%, respectively. © 2011 American Physical Society.