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

Authors
Case, T Crowe, KM Heinsius, FH Kammel, P Lakata, M Degener, T Koch, H Kunze, M Kurilla, U Matthay, H Peters, K Ratajczak, M Stock, H Barnett, BM Herz, M Kalinowsky, H Klempt, E Pick, B Strassburger, C Suh, JS Thoma, U Wittmack, K Hidas, P Baker, CA Batty, CJ Doser, M Kisiel, J Landua, R Adomeit, J Meier, J Ouared, R Seibert, R Strohbusch, U Abele, A Bischoff, S Blum, P Engelhardt, D Herbstrith, A Holtzhaussen, C Tischhauser, M Bugg, DV Hodd, C Zou, BS Haddock, RP Braune, K Dunnweber, W Faessler, MA Hessey, NP Jamnik, D Kolo, C Roethel, W Volcker, C Uman, I Wallis-Plachner, S Walther, D Wiedner, U Berdoz, A McCrady, R Meyer, CA Suffert, M
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
Categorie Soggetti
Physics
Journal title
PHYSICAL REVIEW D
ISSN journal
05562821 → 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.