The φπ+/ωπ+ ratio from $$\bar np$$ annihilationsannihilations

A. Adamo,M. Agnello,F. Balestra,G. Bendiscioli, A. Bertin,P. Boccaccio,G. C. Bonazzola,T. Bressani, M. Bruschi,M. P. Bussa, L. Busso,D. Calvo, M. Capponi,B. Cereda,P. Cerello,C. Cicalò,S. Costa,S De Castro,F. D’Isep,L. Fava, A. Feliciello,L. Ferrero,A. Filippi,V. Filippini,D. Galli,R. Garfagnini,U. Gastaldi, B. Giacobbe,P. Gianotti,A. Grasso,C. Guaraldo,Felice Iazzi, A. Lanaro,E. Lodi Rizzini,M. Lombardi,V. Lucherini,A. Maggiora,S. Marcello,U. Marconi,G. V. Margagliotti, G. Maron, A. Masoni, I. Massa,Bruno Minetti, P. Montagna,M. Morando,F. Nichitiu,D. Panzieri,G. Pauli, M. Piccinini,G. Piragino, M. Poli,G. Puddu,R. A. Ricci,E. Rossetto,A. Rotondi,A. M. Rozhdestvensky,P. Salvini,L. Santi,M. G. Sapozhnikov,N. Semprini Cesari,S. Serci,P. Temnikov,S. Tessaro,F. Tosello,V. I. Tretyak,Giulio Usai,L. Vannucci, S. Vecchi, G. Vedovato, L. Venturelli, M. Villa,A. Vitale,A. Zenoni, A. Zoccoli,G. Zosi

Nuovo Cimento Della Societa Italiana Di Fisica A-nuclei Particles and Fields（2007）

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摘要

A preliminary study of$\bar np$ three-prong annihilations into the channels K− K+ π+ and π− π+ π+ π0 is presented for ∼ 100–297 MeV/c$\bar n$ momenta. The extracted φπ+/ωπ+ production ratio shows that also in this channel, never measured before using an$\bar np$ beam, the OZI rule is strongly violated.

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PACS 14.40 Mesons and meson resonances, PACS 13.75 Hadron-induced low- and intermediate-energy reactions and scattering (energy≤10 GeV), PACS 01.30.Cc Conference proceedings

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