Study of the decay mechanism for B →pp¯K and B →pp¯π

Belle Collaboration; J-T Wei; M-Z Wang; I Adachi; H Aihara; V Aulchenko; T Aushev; AM Bakich; V Balagura; E Barberio; A Bay; K Belous; U Bitenc; A Bondar; A Bozek; M Bračko; TE Browder; P Chang; Y Chao; A Chen; K-F Chen; BG Cheon; C-C Chiang; I-S Cho; Y Choi; YK Choi; S Cole; M Danilov; M Dash; A Drutskoy; S Eidelman; S Fratina; N Gabyshev; B Golob; H Ha; J Haba; T Hara; K Hayasaka; H Hayashii; M Hazumi; D Heffernan; T Hokuue; Y Hoshi; YB Hsiung; HJ Hyun; T Iijima; K Ikado; K Inami; A Ishikawa; R Itoh; M Iwasaki; Y Iwasaki; DH Kah; JH Kang; N Katayama; H Kawai; T Kawasaki; H Kichimi; YJ Kim; K Kinoshita; S Korpar; P Križan; P Krokovny; R Kumar; CC Kuo; A Kuzmin; Y-J Kwon; JS Lee; SE Lee; T Lesiak; S-W Lin; Y Liu; D Liventsev; F Mandl; T Matsumoto; A Matyja; S McOnie; T Medvedeva; W Mitaroff; K Miyabayashi; H Miyake; H Miyata; Y Miyazaki; R Mizuk; Y Nagasaka; E Nakano; M Nakao; S Nishida; O Nitoh; S Ogawa; T Ohshima; S Okuno; SL Olsen; H Ozaki; P Pakhlov; G Pakhlova; CW Park; H Park; KS Park; R Pestotnik; LE Piilonen; H Sahoo; Y Sakai; O Schneider; J Schümann; R Seidl; K Senyo; ME Sevior; M Shapkin; H Shibuya; J-G Shiu; JB Singh; A Sokolov; A Somov; S Stanič; M Starič; T Sumiyoshi; O Tajima; F Takasaki; K Tamai; M Tanaka; GN Taylor; Y Teramoto; XC Tian; I Tikhomirov; T Tsuboyama; S Uehara; K Ueno; T Uglov; Y Unno; S Uno; P Urquijo; G Varner; KE Varvell; K Vervink; S Villa; A Vinokurova; CC Wang; CH Wang; P Wang; Y Watanabe; R Wedd; E Won; A Yamaguchi; Y Yamashita; M Yamauchi; CC Zhang; ZP Zhang; V Zhilich; A Zupanc

Journal article

Study of the decay mechanism for B →pp¯K and B →pp¯π

Belle Collaboration, J-T Wei, M-Z Wang, I Adachi, H Aihara, V Aulchenko, T Aushev, AM Bakich, V Balagura, E Barberio, A Bay, K Belous, U Bitenc, A Bondar, A Bozek, M Bračko, TE Browder, P Chang, Y Chao, A Chen Show all

Physics Letters B | Elsevier | Published : 2008

DOI: 10.1016/j.physletb.2007.11.063

Abstract

We study the characteristics of the low mass pp¯ enhancements near threshold in the three-body decays B+→pp¯K+ and B+→pp¯π+. We observe that the proton polar angle distributions in the pp¯ helicity frame in the two decays have the opposite polarity, and measure the forward-backward asymmetries as a function of the pp¯ mass for the pp¯K+ mode. We also search for the intermediate two-body decays, B+→p¯Δ++ and B+→pΔ¯0, and set upper limits on their branching fractions. These results are obtained from a 414 fb−1 data sample that contains 449×106BB¯ events collected near the ϒ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e− collider.