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ISSN - 03702693, Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 2008, vol. 670, p. 190-195

Search for a CP asymmetry in Cabibbo-suppressed D0 decays

Starič M., Adachi I., Aihara H., Arinstein K., Aushev T., Bakich A. M., Barberio E., Bay A., Bedny I., Belous K., Bhardwaj V., Bitenc U., Bondar A., Bozek A., Bračko M., Brodzicka J., Browder T. E., Chang P., Chao Y., Chen A., Chen K. F., Cheon B. G., Chistov R., Cho I. S., Choi Y., Dalseno J., Dash M., Dungel W., Eidelman S., Fratina S., Gabyshev N., Golob B., Ha H., Haba J., Hara T., Hasegawa Y., Hayasaka K., Hayashii H., Hazumi M., Heffernan D., Hoshi Y., Hou W. S., Hyun H. J., Inami K., Ishikawa A., Ishino H., Itoh R., Iwasaki M., Kah D. H., Kaji H., Kawasaki T., Kichimi H., Kim H. J., Kim H. O., Kim S. K., Kim Y. I., Kim Y. J., Kinoshita K., Korpar S., Križan P., Krokovny P., Kumar R., Kuzmin A., Kwon Y. J., Kyeong S. H., Lange J. S., Lee M. J., Lee S. E., Lesiak T., Limosani A., Liu C., Liu Y., Liventsev D., Mandl F., Matyja A., McOnie S., Miyabayashi K., Miyata H., Miyazaki Y., Moloney G. R., Mori T., Nagamine T., Nagasaka Y., Nakano E., Nakao M., Nakazawa H., Natkaniec Z., Nishida S., Nitoh O., Nozaki T., Ohshima T., Okuno S., Ozaki H.

We measure the CP-violating asymmetries in decays to the D0 → K+ K- and D0 → π+ π- CP eigenstates using 540 fb-1 of data collected with the Belle detector at or near the Υ{hooked} (4 S) resonance. Cabibbo-favored D0 → K- π+ decays are used to correct for systematic detector effects. The results, ACP K K = (- 0.43 ± 0.30 ± 0.11) % and ACP π π = (+ 0.43 ± 0.52 ± 0.12) %, are consistent with no CP violation. © 2008 Elsevier B.V. All rights reserved.