New analysis of the radiative decay $\omega \to \eta\gamma$ in proton-antiproton annihilation at rest

We report on a measurement of the branching ratio of the rare decay omega to eta gamma relative to the well known decay omega to pi /sup 0/ gamma . The omega 's are produced in pp to eta omega and pp to pi /sup 0/ omega . Eigenstate mixing and interference effects of the omega and rho /sup 0/ a...

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Detalles Bibliográficos
Autores principales: Case, T, Crowe, K M, Heinsius, F H, Kammel, P, Lakata, M T, Degener, T F, Koch, H, Kunze, M, Kurilla, U, Matthäy, H, Peters, K, Ratajczak, M, Stöck, H, Barnett, B M, Herz, M, Kalinowsky, H, Klempt, E, Pick, B, Strassburger, C, Suh, J S, Thoma, U, Witmack, K, Hidas, P, Baker, C A, Batty, C J, Doser, Michael, Kisiel, J, Landua, Rolf, Adomeit, J, Meier, J, Ouared, R, Seibert, R, Strohbusch, U, Abele, A, Bischoff, S, Blüm, H P, Engelhardt, D, Herbstrith, A, Holtzhaussen, C, Tischhäuser, M, Bugg, D V, Hodd, C, Zou Bing Song, Haddock, R P, Braune, K, Dünnweber, W, Faessler, M A, Hessey, N P, Jamnik, D, Kolo, C, Röthel, W, Völcker, C, Uman, I, Wallis-Plachner, S, Walther, D, Wiedner, U, Berdoz, A R, McCrady, R G, Meyer, C A, Suffert, Martin
Lenguaje:eng
Publicado: 2000
Materias:
Particle Physics - Experiment
Acceso en línea:http://cds.cern.ch/record/428121
Descripción
Sumario:We report on a measurement of the branching ratio of the rare decay omega to eta gamma relative to the well known decay omega to pi /sup 0/ gamma . The omega 's are produced in pp to eta omega and pp to pi /sup 0/ omega . Eigenstate mixing and interference effects of the omega and rho /sup 0/ are taken into account, as well as coherent interference with the background. We find evidence for the non- resonant annihilation channel B(pp to eta eta gamma )=(3.5+or-1.3)*10 /sup -5/ and limit the value of B( omega to eta gamma ) to the range of (0.7 to 5.5)*10/sup -4/ depending on the degree of coherence with the background. (19 refs).

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