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ISSN - 00319007, EISSN - 10797114, Physical Review Letters, 2012, vol. 109, p. -

Evidence for CP violation in the decay D+ →KS0π+

Ko B. R., Won E., Adachi I., Aihara H., Asner D. M., Aulchenko V., Aushev T., Aziz T., Bakich A. M., Belous K., Bhardwaj V., Bhuyan B., Bischofberger M., Bondar A., Bonvicini G., Bozek A., Bračko M., Browder T. E., Chang M. C., Chen A., Chen P., Cheon B. G., Chilikin K., Cho I. S., Cho K., Choi Y., Doležal Z., Drásal Z., Eidelman S., Fast J. E., Gaur V., Gabyshev N., Garmash A., Goh Y. M., Golob B., Haba J., Hayasaka K., Hayashii H., Horii Y., Hoshi Y., Hou W. S., Hsiung Y. B., Hyun H. J., Iijima T., Ishikawa A., Itoh R., Iwabuchi M., Iwasaki Y., Iwashita T., Julius T., Kang J. H., Kawasaki T., Kiesling C., Kim H. O., Kim J. B., Kim K. T., Kim M. J., Kim Y. J., Kinoshita K., Koblitz S., Kodyš P., Korpar S., Križan P., Krokovny P., Kuhr T., Kuzmin A., Kwon Y. J., Lange J. S., Lee S. H., Li J., Li Y., Libby J., Lim C. L., Liu C., Liu Y., Liu Z. Q., Liventsev D., Louvot R., Matvienko D., Miyazaki Y., Mizuk R., Mohanty G. B., Moll A., Mori T., Muramatsu N., Nagasaka Y., Nakano E., Nakao M., Nakazawa H., Natkaniec Z., Nishida S., Nishimura K., Nitoh O., Ogawa S.

We observe evidence for CP violation in the decay D +→ KS0π + using a data sample with an integrated luminosity of 977fb -1 collected by the Belle detector at the KEKB e +e - asymmetric-energy collider. The CP asymmetry in the decay is measured to be (-0.363±0.094±0.067)%, which is 3.2 standard deviations away from zero, and is consistent with the expected CP violation due to the neutral kaon in the final state. © 2012 American Physical Society.