Observation of B0→π0π0

Y Chao; P Chang; K Abe; K Abe; H Aihara; K Akai; M Akatsu; M Akemoto; Y Asano; T Aushev; S Bahinipati; AM Bakich; A Bay; I Bedny; U Bitenc; I Bizjak; A Bondar; A Bozek; M Bračko; J Brodzicka; TE Browder; A Chen; KF Chen; WT Chen; BG Cheon; R Chistov; SK Choi; Y Choi; A Chuvikov; J Dalseno; M Danilov; M Dash; J Dragic; A Drutskoy; S Eidelman; V Eiges; Y Enari; F Fang; J Flanagan; S Fratina; K Furukawa; N Gabyshev; A Garmash; T Gershon; G Gokhroo; B Golob; J Haba; NC Hastings; K Hayasaka; H Hayashii; M Hazumi; L Hinz; T Hokuue; Y Hoshi; S Hou; WS Hou; YB Hsiung; T Iijima; H Ikeda; A Imoto; K Inami; A Ishikawa; R Itoh; M Iwasaki; Y Iwasaki; JH Kang; JS Kang; P Kapusta; SU Kataoka; N Katayama; H Kawai; T Kawasaki; HR Khan; H Kichimi; E Kikutani; HJ Kim; JH Kim; SK Kim; K Kinoshita; H Koiso; S Korpar; P Krokovny; S Kumar; CC Kuo; A Kuzmin; YJ Kwon; JS Lange; G Leder; SE Lee; SH Lee; YJ Lee; T Lesiak; J Li; A Limosani; SW Lin; J MacNaughton; G Majumder; F Mandl; T Matsumoto; S Michizono

Journal article

Observation of B0→π0π0

Y Chao, P Chang, K Abe, K Abe, H Aihara, K Akai, M Akatsu, M Akemoto, Y Asano, T Aushev, S Bahinipati, AM Bakich, A Bay, I Bedny, U Bitenc, I Bizjak, A Bondar, A Bozek, M Bračko, J Brodzicka Show all

Physical Review Letters | AMER PHYSICAL SOC | Published : 2005

DOI: 10.1103/PhysRevLett.94.181803

Abstract

We report the observation of the decay B0→π0π0, using a 253fb-1 data sample collected at the Υ(4S) resonance with the Belle detector at the KEKB e+e- collider. The measured branching fraction is B(B0→π0π0)= (2.3-0.5-0.3+0.4+0.2)×10-6, with a significance of 5.8 standard deviations including systematic uncertainties. We also make a measurement of the direct CP violating asymmetry in this mode. © 2005 The American Physical Society.