Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8194982 | Physics Letters B | 2008 | 6 Pages |
Abstract
We have studied the e+eââÏÏ0 cross section in the s interval 1000-1030 MeV using the Ï+ÏâÏ0Ï0 and Ï0Ï0γ final states with a sample of â¼600pbâ1 collected with the KLOE detector at DAΦNE. By fitting the observed interference pattern around MÏ for both final states, we extract the ratio of the decay widths Î(ÏâÏ0γ)/Î(ÏâÏ+ÏâÏ0)=0.0897±0.0016 and derive the branching fractions BR(ÏâÏ+ÏâÏ0)=(90.24±0.19)%, BR(ÏâÏ0γ)=(8.09±0.14)%. The parameters describing the e+eââÏ+ÏâÏ0Ï0 reaction around MÏ are also used to extract the branching fraction for the OZI and G-parity violating ÏâÏÏ0 decay: BR(ÏâÏÏ0)=(4.4±0.6)Ã10â5.
Keywords
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Nuclear and High Energy Physics
Authors
KLOE Collaboration KLOE Collaboration, F. Ambrosino, A. Antonelli, M. Antonelli, F. Archilli, P. Beltrame, G. Bencivenni, S. Bertolucci, C. Bini, C. Bloise, S. Bocchetta, F. Bossi, P. Branchini, P. Campana, G. Capon, T. Capussela, F. Ceradini,