Measurement of the ω → ηγ decay branching ratio

A. Abele, J. Adomeit, C. Amsler, C. A. Baker, B. M. Barnett, C. J. Batty, M. Benayoun, A. Berdoz, K. Beuchert, S. Bischoff, P. Blüm, K. Braune, D. V. Bugg, T. Case, A. Cooper, O. Cramer, K. M. Crowe, V. Credé, T. Degener, N. DjaoshviliS. V. Dombrowski, M. Doser, W. Dünnweber, A. Ehmanns, D. Engelhardt, M. A. Faessler, P. Giarritta, R. Hackmann, R. P. Haddock, F. H. Heinsius, M. Heinzelmann, M. Herz, N. P. Hessey, P. Hidas, C. Hodd, C. Holtzhaußen, D. Jamnik, H. Kalinowsky, B. Kalteyer, B. Kämmle, P. Kammel, J. Kisiel, E. Klempt, H. Koch, C. Kolo, U. Kurilla, M. Kunze, M. Lakata, R. Landua, J. Lüdemann, H. Matthäy, R. McCrady, J. Meier, C. A. Meyer, L. Montanet, R. Ouared, F. Ould-Saada, K. Peters, B. Pick, C. Pietra, C. N. Pinder, M. Ratajczak, C. Regenfus, S. Resag, W. Roethel, P. Schmidt, I. Scott, R. Seibert, S. Spanier, H. Stöck, C. Straßburger, U. Strohbusch, M. Suffert, U. Thoma, M. Tischhäuser, C. Völcker, S. Wallis, D. Walther, U. Wiedner, B. S. Zou

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Abstract

We have measured the branching ratio for the radiative decay ω → ηγ with ω mesons produced in antiproton-proton annihilation at rest into π0ω and ηω. Taking into account ρ - ω mixing we find a branching ratio B(ω - ηγ) = (6.6 ± 1.7) × 10-4, in accord with the constructive interference solution in other experiments. The upper-limit for the direct radiative decay ω → 3γ is 1.9 × 10-4 at 95% confidence level.

Original languageEnglish
Pages (from-to)361-372
Number of pages12
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume411
Issue number3-4
DOIs
Publication statusPublished - Oct 16 1997

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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  • Cite this

    Abele, A., Adomeit, J., Amsler, C., Baker, C. A., Barnett, B. M., Batty, C. J., Benayoun, M., Berdoz, A., Beuchert, K., Bischoff, S., Blüm, P., Braune, K., Bugg, D. V., Case, T., Cooper, A., Cramer, O., Crowe, K. M., Credé, V., Degener, T., ... Zou, B. S. (1997). Measurement of the ω → ηγ decay branching ratio. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 411(3-4), 361-372. https://doi.org/10.1016/S0370-2693(97)01024-1