Year: 2000
Type: article
Abstract: We report on a measurement of the branching ratio of the rare decay $\stackrel{\ensuremath{\rightarrow}}{\ensuremath{\omega}}\ensuremath{\eta}\ensuremath{\gamma}$ relative to the well known decay $\stackrel{\ensuremath{\rightarrow}}{\ensuremath{\omega}}{\ensuremath{\pi}}^{0}\ensuremath{\gamma}.$ The \ensuremath{\omega}'s are produced in $p\overline{p}\ensuremath{\rightarrow}\ensuremath{\eta}\ensuremath{\omega}$ and $p\overline{p}\ensuremath{\rightarrow}{\ensuremath{\pi}}^{0}\ensuremath{\omega}.$ Eigenstate mixing and interference effects of the \ensuremath{\omega} and ${\ensuremath{\rho}}^{0}$ are taken into account, as well as coherent interference with the background. We find evidence for the non-resonant annihilation channel $B(p\overline{p}\ensuremath{\rightarrow}\ensuremath{\eta}\ensuremath{\eta}\ensuremath{\gamma})=(3.5\ifmmode\pm\else\textpm\fi{}1.3)\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}5}$ and limit the value of $B(\stackrel{\ensuremath{\rightarrow}}{\ensuremath{\omega}}\ensuremath{\eta}\ensuremath{\gamma})$ to the range of $(0.7\mathrm{to}5.5)\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}4}$ depending on the degree of coherence with the background.
Authors: T. Case, K. M. Crowe, F. H. Heinsius, P. Kammel, M. Lakata, T. Degener, H. Koch, M. Kunze, U. Kurilla, H. Matthäy, K. Peters, M. Ratajczak, H. Stöck, B. M. Barnett, M. Herz, H. Kalinowsky, E. Klempt, B. Pick, C. Straßburger, J. S. Suh, U. Thoma, K. Wittmack, P. Hidas, C. A. Baker, C. J. Batty, M. Doser, J. Kisiel, R. Landua, J. Adomeit, J. Meier, R. Ouared, R. Seibert, U. Strohbusch, A. Abele, S. Bischoff, P. Blüm, D. Engelhardt, A. Herbstrith, C. Holtzhaußen, M. Tischhäuser, D. V. Bugg, C. Hodd, B. S. Zou, R. P. Haddock, K. Braune, W. Dünnweber, M. A. Faessler, N. P. Hessey, D. Jamnik, C. Kolo, W. Roethel, C. Völcker, I. Uman, S. Wallis-Plachner, D. Walther, U. Wiedner, A. Berdoz, R. McCrady, C. A. Meyer, M. Suffert
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W48088235