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Phys Rev Lett. 2004 Nov 12;93(20):201802. doi: 10.1103/PhysRevLett.93.201802. Epub 2004 Nov 09.

Search for CP violation in the decay B0-->D*+/-D-/+.

Physical review letters

T Aushev, Y Iwasaki, K Abe, K Abe, I Adachi, H Aihara, M Akatsu, Y Asano, T Aziz, S Bahinipati, A M Bakich, A Bay, I Bedny, U Bitenc, I Bizjak, S Blyth, A Bondar, A Bozek, M Bracko, J Brodzicka, P Chang, Y Chao, A Chen, W T Chen, B G Cheon, R Chistov, Y Choi, A Chuvikov, M Danilov, M Dash, L Y Dong, J Dragic, A Drutskoy, S Eidelman, V Eiges, Y Enari, F Fang, S Fratina, N Gabyshev, A Garmash, T Gershon, G Gokhroo, B Golob, N C Hastings, K Hayasaka, M Hazumi, T Higuchi, L Hinz, T Hokuue, Y Hoshi, S Hou, W-S Hou, T Iijima, A Imoto, K Inami, A Ishikawa, H Ishino, R Itoh, M Iwasaki, J H Kang, J S Kang, S U Kataoka, N Katayama, H Kawai, T Kawasaki, H R Khan, H J Kim, S K Kim, K Kinoshita, P Koppenburg, S Korpar, P Krizan, P Krokovny, C C Kuo, A Kuzmin, Y-J Kwon, J S Lange, G Leder, S H Lee, T Lesiak, J Li, S-W Lin, D Liventsev, J Macnaughton, F Mandl, T Matsumoto, W Mitaroff, K Miyabayashi, H Miyake, H Miyata, R Mizuk, D Mohapatra, T Mori, T Nagamine, Y Nagasaka, E Nakano, M Nakao, H Nakazawa, Z Natkaniec, S Nishida, O Nitoh, S Ogawa, T Ohshima, T Okabe, S Okuno, S L Olsen, W Ostrowicz, H Ozaki, P Pakhlov, H Palka, H Park, L S Peak, L E Piilonen, H Sagawa, Y Sakai, N Sato, T Schietinger, O Schneider, J Schümann, A J Schwartz, S Semenov, K Senyo, M E Sevior, H Shibuya, A Somov, N Soni, R Stamen, M Staric, K Sumisawa, T Sumiyoshi, O Tajima, F Takasaki, N Tamura, M Tanaka, G N Taylor, Y Teramoto, K Trabelsi, T Tsukamoto, S Uehara, T Uglov, K Ueno, S Uno, G Varner, K E Varvell, S Villa, C C Wang, C H Wang, B D Yabsley, A Yamaguchi, Y Yamashita, J Ying, Y Yuan, S L Zang, J Zhang, L M Zhang, Z P Zhang, V Zhilich, D Zontar,

Affiliations

  1. Institute for Theoretical and Experimental Physics, Moscow.

PMID: 15600912 DOI: 10.1103/PhysRevLett.93.201802

Abstract

We report a search for CP-violating asymmetry in B0-->D(*+/-)D-/+ decays. The analysis employs two methods of B0 reconstruction: full and partial. In the full reconstruction method all daughter particles of the B0 are required to be detected; the partial reconstruction technique requires a fully reconstructed D- and only a slow pion from the D(*+)-->D0pi(+)(slow) decay. From a fit to the distribution of the time interval corresponding to the distance between two B meson decay points we calculate the CP-violating parameters and find the significance of nonzero CP asymmetry to be 2.7 standard deviations.

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