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ISSN - 03702693, Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 2005, vol. 624, p. 11-21

Time-dependent C P violation effects in partially reconstructed B 0 → D*∓π± decays

Gershon T., Abe K., Abe K., Adachi I., Aihara H., Asano Y., Aushev T., Bahinipati S., Bakich A. M., Banerjee S., Bay A., Bedny I., Bitenc U., Bizjak I., Blyth S., Bondar A., Bozek A., Bračko M., Brodzicka J., Browder T. E., Chang M. C., Chang P., Chao Y., Chen A., Chen W. T., Cheon B. G., Choi S. K., Choi Y., Chuvikov A., Cole S., Dalseno J., Danilov M., Dash M., Dragic J., Eidelman S., Fratina S., Gabyshev N., Garmash A., Gokhroo G., Golob B., Gorišek A., Haba J., Hara K., Hastings N. C., Hayasaka K., Hayashii H., Hazumi M., Hinz L., Hokuue T., Hoshi Y., Hou S., Hou W. S., Iijima T., Imoto A., Inami K., Ishikawa A., Ishino H., Itoh R., Iwasaki M., Iwasaki Y., Kang J. H., Kang J. S., Kapusta P., Katayama N., Kawai H., Kawasaki T., Kent N., Khan H. R., Kichimi H., Kim H. J., Kim S. M., Kinoshita K., Krokovny P., Kumar S., Kuo C. C., Kuzmin A., Kwon Y. J., Leder G., Lesiak T., Li J., Limosani A., Lin S. W., Liventsev D., MacNaughton J., Majumder G., Mandl F., Marlow D., Matsumoto T., Mikami Y., Mitaroff W., Miyabayashi K., Miyake H., Miyata H., Mohapatra D., Moloney G. R., Nagamine T.

We report measurements of time-dependent decay rates for B0 → D*∓π± decays and extraction of C P violation parameters related to φ3. We use a partial reconstruction technique, whereby signal events are identified using information only from the primary pion and the charged pion from the decay of the D*∓. The analysis uses 140 fb-1 of data accumulated at the γ (4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. We measure the C P violation parameters S+ = 0.035 ± 0.041 (stat) ± 0.018 (syst) and S- = 0.025 ± 0.041 (stat) ± 0.018 (syst). © 2005 Elsevier B.V. All rights reserved.