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. 2003 Dec 31;91(26 Pt 1):261602.
doi: 10.1103/PhysRevLett.91.261602. Epub 2003 Dec 31.

Measurement of time-dependent CP-violating asymmetries in B0-->phiK(0)S, K+K-K0(S), and eta'K0(S) decays

K Abe  1 , K Abe, T Abe, I Adachi, H Aihara, K Akai, M Akatsu, Y Asano, T Aso, T Aushev, S Bahinipati, A M Bakich, Y Ban, S Banerjee, I Bedny, I Bizjak, A Bondar, A Bozek, M Bracko, J Brodzicka, T E Browder, M-C Chang, P Chang, Y Chao, K-F Chen, B G Cheon, R Chistov, S-K Choi, Y Choi, Y K Choi, A Chuvikov, M Danilov, L Y Dong, S Eidelman, V Eiges, Y Enari, J Flanagan, C Fukunaga, K Furukawa, N Gabyshev, A Garmash, T Gershon, B Golob, R Guo, J Haba, C Hagner, K Hara, T Hara, N C Hastings, H Hayashii, M Hazumi, I Higuchi, T Higuchi, T Hokuue, Y Hoshi, W-S Hou, Y B Hsiung, H-C Huang, Y Igarashi, T Iijima, H Ikeda, K Inami, A Ishikawa, H Ishino, R Itoh, H Iwasaki, M Iwasaki, Y Iwasaki, T Kamitani, J H Kang, J S Kang, P Kapusta, S U Kataoka, N Katayama, H Kawai, H Kawai, T Kawasaki, H Kichimi, M Kikuchi, E Kikutani, H J Kim, Hyunwoo Kim, J H Kim, S K Kim, K Kinoshita, H Koiso, P Koppenburg, S Korpar, P Krizan, P Krokovny, S Kumar, Y-J Kwon, J S Lange, G Leder, S H Lee, T Lesiak, J Li, A Limosani, S-W Lin, D Liventsev, J MacNaughton, F Mandl, D Marlow, M Masuzawa, T Matsumoto, A Matyja, S Michizono, T Mimashi, W Mitaroff, K Miyabayashi, H Miyake, H Miyata, D Mohapatra, T Mori, A Murakami, T Nagamine, Y Nagasaka, T Nakadaira, T T Nakamura, E Nakano, M Nakao, Z Natkaniec, S Nishida, O Nitoh, T Nozaki, S Ogawa, Y Ogawa, K Ohmi, Y Ohnishi, T Ohshima, N Ohuchi, K Oide, T Okabe, S Okuno, S L Olsen, Y Onuki, W Ostrowicz, H Ozaki, P Pakhlov, H Palka, C W Park, H Park, M Peters, L E Piilonen, N Root, M Rozanska, H Sagawa, S Saitoh, Y Sakai, M Satapathy, A Satpathy, O Schneider, J Schümann, C Schwanda, A J Schwartz, S Semenov, K Senyo, M E Sevior, T Shibata, H Shibuya, T Shidara, B Shwartz, V Sidorov, J B Singh, N Soni, S Stanic, R Sugahara, A Sugi, T Sugimura, A Sugiyama, K Sumisawa, T Sumiyoshi, K Suzuki, S Suzuki, S Y Suzuki, F Takasaki, N Tamura, J Tanaka, M Tanaka, M Tawada, Y Teramoto, T Tomura, K Trabelsi, T Tsuboyama, T Tsukamoto, S Uehara, K Ueno, Y Unno, S Uno, Y Ushiroda, S E Vahsen, G Varner, K E Varvell, C C Wang, C H Wang, J G Wang, M-Z Wang, Y Watanabe, E Won, B D Yabsley, Y Yamada, A Yamaguchi, H Yamamoto, N Yamamoto, Y Yamashita, M Yamauchi, H Yanai, Heyoung Yang, J Ying, M Yokoyama, M Yoshida, Y Yuan, Y Yusa, C C Zhang, J Zhang, Z P Zhang, Y Zheng, V Zhilich, D Zontar, D Zürcher; Belle Collaboration
Affiliations

Measurement of time-dependent CP-violating asymmetries in B0-->phiK(0)S, K+K-K0(S), and eta'K0(S) decays

K Abe et al. Phys Rev Lett. .

Abstract

We present an improved measurement of CP-violation parameters in B0-->phiK(0)(S), K(+)K(-)K(0)(S), and eta(')K(0)(S) decays based on a 140 fb(-1) data sample collected at the Upsilon(4S) resonance with the Belle detector at the KEKB energy-asymmetric e(+)e(-) collider. One neutral B meson is fully reconstructed in one of the specified decay channels, and the flavor of the accompanying B meson is identified from its decay products. CP-violation parameters for each of the three modes are obtained from the asymmetries in the distributions of the proper-time intervals between the two B decays. We find that the observed CP asymmetry in the B-->phiK(0)(S) decay differs from the standard model (SM) expectation by 3.5 standard deviations, while the other cases are consistent with the SM.

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