Proton-antiproton annihilation into ηηπ-observation of a scalar resonance decaying into ηη

C. Amsler, I. Augustin, C. A. Baker, B. M. Barnett, C. J. Batty, R. Beckmann, K. Beuchert, P. Birien, J. Bistirlich, P. Blüm, R. Bossingham, H. Bossy, K. Braune, D. V. Bugg, M. Burchell, T. Case, A. Cooper, K. M. Crowe, H. P. Dietz, S. von DombrowskiM. 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, E. Klempt, H. Koch, K. Königsmann, C. Kolo, M. Kunze, R. Landua, J. Lüdemann, H. Matthaey, M. Merkel, J. P. Merlo, C. A. Meyer, U. Meyer-Berkhout, L. Montanet, A. Noble, 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, D. Walther, U. Wiedner, N. Winter, J. Zoll, C. Zupancic

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Abstract

The results of a measurement of p̄p annihilation at rest into ηηπ0 are presented. Assuming a resonance dominated model for the annihilation process an isoscalar JPC=0++ resonance decaying into ηη is observed with a mass of 1560±25 MeV/c2 and a width of 245±50 MeV/c2.

Original languageEnglish
Pages (from-to)347-354
Number of pages8
JournalPhysics Letters B
Volume291
Issue number3
DOIs
Publication statusPublished - Sep 24 1992

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ASJC Scopus subject areas

  • Nuclear and High Energy Physics

Cite this

Amsler, C., Augustin, I., Baker, C. A., Barnett, B. M., Batty, C. J., Beckmann, R., Beuchert, K., Birien, P., Bistirlich, J., Blüm, P., Bossingham, R., Bossy, H., Braune, K., Bugg, D. V., Burchell, M., Case, T., Cooper, A., Crowe, K. M., Dietz, H. P., ... Zupancic, C. (1992). Proton-antiproton annihilation into ηηπ-observation of a scalar resonance decaying into ηη. Physics Letters B, 291(3), 347-354. https://doi.org/10.1016/0370-2693(92)91057-G