Observation of radiative pp annihilation into a Φ meson

C. Amsler, D. S. Armstrong, I. Augustin, C. A. Baker, B. M. Barnett, C. J. Batty, K. Beuchert, P. Birien, P. Blüm, R. Bossingham, K. Braune, J. Brose, D. V. Bugg, M. Burchell, T. Case, A. Cooper, O. Cramer, K. M. Crowe, T. Degener, H. P. DietzS. v. Dombrowski, M. Doser, W. Dünnweber, D. Engelhardt, M. Englert, M. A. Faessler, C. Felix, R. Hackmann, R. P. Haddock, F. H. Heinsius, M. Herz, N. P. Hessey, P. Hidas, P. Illinger, D. Jamnik, H. Kalinowsky, B. Kämmle, T. Kiel, J. Kisiel, E. Klempt, M. Kobel, H. Koch, C. Kolo, K. Königsmann, M. Kunze, M. Lakata, R. Landua, J. Lüdemann, H. Matthäy, R. McCrady, M. Merkel, J. P. Merlo, C. A. Meyer, L. Montanet, A. Noble, F. Ould-Saada, K. Peters, C. N. Pinder, G. Pinter, S. Ravndal, C. Regenfus, E. Schäfer, P. Schmidt, R. Seibert, S. Spanier, H. Stöck, C. Straßburger, U. Strohbusch, M. Suffert, U. Thoma, M. Tischhäuser, D. Urner, C. Völcker, F. Walter, D. Walther, U. Wiedner, N. Winter, J. Zoll, B. S. Zou, Č Zupančič

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Abstract

The annihilation pp → Φγ has been investigated with the Crystal Barrel detector at LEAR for antiprotons stopped in liquid hydrogen. The observed branching ratio BR(pp → Φγ = (1.7 ± 0.4) · 10-5 is almost two orders of magnitude higher than expected from the OZI-rule. As a by-product, the branching ratios BR(pp → KLKS) = (9.0 ± 0.6) · 10-4 and BR(pp → Φπ0) = (5.5 ± 0.7) · 10-4 have been measured.

Original languageEnglish
Pages (from-to)363-370
Number of pages8
JournalPhysics Letters B
Volume346
Issue number3-4
DOIs
Publication statusPublished - Mar 9 1995

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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  • Cite this

    Amsler, C., Armstrong, D. S., Augustin, I., Baker, C. A., Barnett, B. M., Batty, C. J., Beuchert, K., Birien, P., Blüm, P., Bossingham, R., Braune, K., Brose, J., Bugg, D. V., Burchell, M., Case, T., Cooper, A., Cramer, O., Crowe, K. M., Degener, T., ... Zupančič, Č. (1995). Observation of radiative pp annihilation into a Φ meson. Physics Letters B, 346(3-4), 363-370. https://doi.org/10.1016/0370-2693(95)00141-7