New analysis of the radiative decay omega ->eta gamma in proton-antiprotonannihilation at rest - art. no. 032002

Citation
T. Case et al., New analysis of the radiative decay omega ->eta gamma in proton-antiprotonannihilation at rest - art. no. 032002, PHYS REV D, 6103(3), 2000, pp. 2002
Citations number
19
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physics
Journal title
PHYSICAL REVIEW D
ISSN journal
0556-2821 → ACNP
Volume
6103
Issue
3
Year of publication
2000
Database
ISI
SICI code
0556-2821(20000201)6103:3<2002:NAOTRD>2.0.ZU;2-S
Abstract
We report on a measurement of the branching ratio of the rare decay omega - -> eta gamma relative to the well known decay omega --> pi(0)gamma. The ome ga's are produced in <p(p)over bar> --> eta omega and <p(p)over bar> --> pi (0)omega. Eigenstate mixing and interference effects. of the wand rho(0) ar e taken into account, as well as coherent interference with the background. We find evidence for the non-resonant annihilation channel B(<p(p)over bar > --> eta eta gamma) = (3.5 +/- 1.3) x 10(-5) and limit the value of B(omeg a --> eta gamma) to the range of (0.7 to 5.5) x 10(-4) depending on the deg ree of coherence with the background.