Antiproton-proton annihilation at rest into two-body final states

C. Amsler, D. S. Armstrong, I. Augustin, C. A. Baker, B. M. Barnett, C. J. Batty, K. Beuchert, P. Birien, J. Bistirlich, P. Blum, R. Bossingham, H. Bossy, K. Braune, J. Brose, D. V. Bugg, M. Burchell, T. Case, S. U. Chung, A. Cooper, K. M. CroweH. P. Dietz, S. v. Dombrowski, M. Doser, W. Dünnweber, D. Engelhardt, M. Englert, M. A. Faessler, C. Felix, G. Folger, R. Hackmann, R. P. Haddock, F. H. Heinsius, N. P. Hessey, P. Hidas, P. Illinger, D. Jamnik, Z. Jávorfi, H. Kalinowsky, B. Kämmle, T. Kiel, J. Kisiel, E. Klempt, M. Kobel, H. Koch, C. Kolo, K. Königsmann, M. Kunze, R. Landua, J. Lüdemann, H. Matthaey, M. Merkel, J. P. Merlo, C. A. Meyer, U. Meyer-Berkhout, L. Montanet, A. Noble, F. Ould-Saada, K. Peters, G. Pinter, S. Ravndal, A. H. Sanjari, E. Schäfer, B. Schmid, P. Schmidt, S. Spanier, C. Straßburger, U. Strohbusch, M. Suffert, D. Urner, C. Völcker, F. Walter, D. Walther, U. Wiedner, N. Winter, J. Zoll, C. Zupančič

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We report measurements of branching ratios for production of a series of two meson final states in {Mathematical expression}p annihilations at rest in liquid hydrogen. We find: {Mathematical expression} These are the first measurements of the channels ηη′ and ωη′ and in almost all the other channels are more precise than previous results. We also obtain, in a more precise fashion, the following ratios of branching ratios:K+K-+π-=0.323±0.013, π0η′/π0η=0.548±0.056, ηη′/ηη=0.31±0.15, ωη′/ωη=0.515±0.040, π0η/π0π0=0.303±0.010, ηη/π0π0=0.232±0.011 and π0ω/ηω=0.377±0.12. The measurements are made for different η and η′ decays, and we thus obtain Γη→3π0η→γγ=0.841±0.034, and {Mathematical expression}.

Original languageEnglish
Pages (from-to)175-189
Number of pages15
JournalZeitschrift für Physik C Particles and Fields
Issue number2
Publication statusPublished - Jun 1 1993


ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Cite this

Amsler, C., Armstrong, D. S., Augustin, I., Baker, C. A., Barnett, B. M., Batty, C. J., Beuchert, K., Birien, P., Bistirlich, J., Blum, P., Bossingham, R., Bossy, H., Braune, K., Brose, J., Bugg, D. V., Burchell, M., Case, T., Chung, S. U., Cooper, A., ... Zupančič, C. (1993). Antiproton-proton annihilation at rest into two-body final states. Zeitschrift für Physik C Particles and Fields, 58(2), 175-189.