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ISSN - 03702693, Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 2008, vol. 662, p. 102-110

Measurement of the ratio B (D0 → π+ π- π0) / B (D0 → K- π+ π0) and the time-integrated CP asymmetry in D0 → π+ π- π0

Arinstein K., Adachi I., Aihara H., Aulchenko V., Aushev T., Aziz T., Bahinipati S., Bakich A. M., Balagura V., Barberio E., Bay A., Bedny I., Belous K., Bhardwaj V., Bitenc U., Blyth S., Bondar A., Bozek A., Bračko M., Browder T. E., Chao Y., Chen A., Chen W. T., Cheon B. G., Chistov R., Cho I. S., Choi Y., Cole S., Dalseno J., Danilov M., Dash M., Drutskoy A., Eidelman S., Epifanov D., Gabyshev N., Goldenzweig P., Golob B., Ha H., Haba J., Hara K., Hayasaka K., Hayashii H., Hazumi M., Hoshi Y., Hou W. S., Iijima T., Inami K., Ishikawa A., Ishino H., Itoh R., Iwasaki M., Iwasaki Y., Joshi N. J., Kah D. H., Kaji H., Kang J. H., Katayama N., Kawai H., Kawasaki T., Kichimi H., Kim S. K., Kim Y. J., Kinoshita K., Korpar S., Kozakai Y., Križan P., Krokovny P., Kumar R., Kuo C. C., Kuroki Y., Kuzmin A., Kwon Y. J., Lange J. S., Lee J. S., Lee M. J., Lee S. E., Lesiak T., Limosani A., Lin S. W., Liu C., Liu Y., Liventsev D., Mandl F., McOnie S., Mitaroff W., Miyabayashi K., Miyake H., Miyata H., Miyazaki Y., Mizuk R., Moloney G. R., Mori T., Nakano E., Nakao M.

We report a high-statistics measurement of the relative branching fraction B (D0 → π+ π- π0) / B (D0 → K- π+ π0) using a 532 fb-1 data sample collected with the Belle detector at the KEKB asymmetric-energy e+ e- collider. The measured value of the relative branching fraction is B (D0 → π+ π- π0) / B (D0 → K- π+ π0) = (10.12 ± 0.04 (stat) ± 0.18 (syst)) × 10-2, which has an accuracy comparable to the world average. We also present a measurement of the time-integrated CP asymmetry in D0 → π+ π- π0 decay. The result, ACP = (0.43 ± 1.30) %, shows no significant CP violation. © 2008 Elsevier B.V. All rights reserved.