Observation of B{0}-->ppK*0 with a large K*0 polarization

J-H Chen; M-Z Wang; I Adachi; H Aihara; K Arinstein; V Aulchenko; T Aushev; A M Bakich; V Balagura; E Barberio; A Bay; I Bedny; K Belous; U Bitenc; A Bondar; A Bozek; M Bracko; T E Browder; M-C Chang; Y Chao; A Chen; K-F Chen; W T Chen; B G Cheon; R Chistov; I-S Cho; S-K Choi; Y Choi; J Dalseno; M Dash; A Drutskoy; S Eidelman; B Golob; H Ha; J Haba; T Hara; K Hayasaka; H Hayashii; M Hazumi; D Heffernan; Y Hoshi; W-S Hou; Y B Hsiung; H J Hyun; K Inami; A Ishikawa; H Ishino; R Itoh; M Iwasaki; N J Joshi; D H Kah; H Kaji; P Kapusta; N Katayama; T Kawasaki; H Kichimi; H J Kim; S K Kim; Y J Kim; K Kinoshita; P Krokovny; R Kumar; C C Kuo; Y-J Kwon; J S Lee; M J Lee; S E Lee; T Lesiak; J Li; A Limosani; C Liu; D Liventsev; F Mandl; A Matyja; S McOnie; T Medvedeva; W Mitaroff; H Miyake; H Miyata; Y Miyazaki; R Mizuk; E Nakano; M Nakao; H Nakazawa; Z Natkaniec; S Nishida; O Nitoh; S Ogawa; T Ohshima; S Okuno; S L Olsen; H Ozaki; P Pakhlov; G Pakhlova; H Palka; C W Park; H Park; L S Peak; R Pestotnik; L E Piilonen; M Rozanska; H Sahoo; Y Sakai; O Schneider; K Senyo; M E Sevior; M Shapkin; C P Shen; H Shibuya; J-G Shiu; J B Singh; A Somov; S Stanic; M Staric; T Sumiyoshi; F Takasaki; M Tanaka; G N Taylor; Y Teramoto; I Tikhomirov; K Trabelsi; S Uehara; K Ueno; T Uglov; Y Unno; S Uno; P Urquijo; Y Usov; G Varner; K Vervink; S Villa; A Vinokurova; C C Wang; C H Wang; P Wang; X L Wang; Y Watanabe; R Wedd; E Won; H Yamamoto; Y Yamashita; C C Zhang; Z P Zhang; V Zhulanov; A Zupanc; Belle Collaboration

doi:10.1103/PhysRevLett.100.251801

Observation of B{0}-->ppK0 with a large K0 polarization

Phys Rev Lett. 2008 Jun 27;100(25):251801. doi: 10.1103/PhysRevLett.100.251801. Epub 2008 Jun 25.

Authors

J-H Chen¹, M-Z Wang, I Adachi, H Aihara, K Arinstein, V Aulchenko, T Aushev, A M Bakich, V Balagura, E Barberio, A Bay, I Bedny, K Belous, U Bitenc, A Bondar, A Bozek, M Bracko, T E Browder, M-C Chang, Y Chao, A Chen, K-F Chen, W T Chen, B G Cheon, R Chistov, I-S Cho, S-K Choi, Y Choi, J Dalseno, M Dash, A Drutskoy, S Eidelman, B Golob, H Ha, J Haba, T Hara, K Hayasaka, H Hayashii, M Hazumi, D Heffernan, Y Hoshi, W-S Hou, Y B Hsiung, H J Hyun, K Inami, A Ishikawa, H Ishino, R Itoh, M Iwasaki, N J Joshi, D H Kah, H Kaji, P Kapusta, N Katayama, T Kawasaki, H Kichimi, H J Kim, S K Kim, Y J Kim, K Kinoshita, P Krokovny, R Kumar, C C Kuo, Y-J Kwon, J S Lee, M J Lee, S E Lee, T Lesiak, J Li, A Limosani, C Liu, D Liventsev, F Mandl, A Matyja, S McOnie, T Medvedeva, W Mitaroff, H Miyake, H Miyata, Y Miyazaki, R Mizuk, E Nakano, M Nakao, H Nakazawa, Z Natkaniec, S Nishida, O Nitoh, S Ogawa, T Ohshima, S Okuno, S L Olsen, H Ozaki, P Pakhlov, G Pakhlova, H Palka, C W Park, H Park, L S Peak, R Pestotnik, L E Piilonen, M Rozanska, H Sahoo, Y Sakai, O Schneider, K Senyo, M E Sevior, M Shapkin, C P Shen, H Shibuya, J-G Shiu, J B Singh, A Somov, S Stanic, M Staric, T Sumiyoshi, F Takasaki, M Tanaka, G N Taylor, Y Teramoto, I Tikhomirov, K Trabelsi, S Uehara, K Ueno, T Uglov, Y Unno, S Uno, P Urquijo, Y Usov, G Varner, K Vervink, S Villa, A Vinokurova, C C Wang, C H Wang, P Wang, X L Wang, Y Watanabe, R Wedd, E Won, H Yamamoto, Y Yamashita, C C Zhang, Z P Zhang, V Zhulanov, A Zupanc; Belle Collaboration

Affiliation

¹ Department of Physics, National Taiwan University, Taipei.

PMID: 18643652
DOI: 10.1103/PhysRevLett.100.251801

Abstract

Using a 492 fb{-1} data sample collected near the Upsilon(4S) resonance with the Belle detector at the KEKB asymmetric-energy e{+}e{-} collider, we observe the decay B{0}-->ppK*0 with a branching fraction of (1.18{-0.25}{+0.29}(stat)+/-0.11(syst))x10{-6}. We study the decay dynamics of B{0}-->ppK*0 and compare with B{+}-->ppK*+. The K*0 meson is found to be almost 100% polarized (with a fraction of (101+/-13+/-3)% in the helicity zero state), while the K*+ meson has a (32+/-17+/-9)% fraction in the helicity zero state. The direct CP asymmetries for B{0}-->ppK*0 and B{+}-->ppK*+ are measured to be -0.08+/-0.20+/-0.02 and -0.01+/-0.19+/-0.02, respectively. In addition, we report improved measurements of the branching fractions B(B{+}-->ppK*+)=(3.38{-0.60}{+0.73}+/-0.39)x10{-6} and B(B{0}-->ppK{0})=(2.51{-0.29}{+0.35}+/-0.21)x10{-6}, which supersede our previous measurements.