Study of anti-n p --> phi pi+ and anti-n p --> omega pi+ annihilation reactions in flight

The results of a study of the annihilation reactions nbarp -> phi pi sup + and nbarp -> omega pi sup + are reported; the data were collected by the OBELIX apparatus, with antineutrons annihilating in flight (momenta from approx 50 MeV/c to 405 MeV/c). Annihilation frequencies and annihilation...

Descripción completa

Detalles Bibliográficos
Autores principales: Filippi, A, Agnello, M, Balestra, F, Bergo, D, Botta, E, Bressani, Tullio, Bussa, M P, Busso, L, Calvo, D, Cerello, P, Costa, S, Denisov, O, Fanara, C, Feliciello, A, Ferrero, L, Garfagnini, R, Grasso, A, Iazzi, F, Maggiora, A, Marcello, S, Minetti, B, Mirfakhraee, N, Panzarasa, A, Panzieri, D, Raimondo, A, Tosello, F, Valacca, L, Zosi, G, Alberico, V, Bertin, A, Bruschi, M, Capponi, M, De Castro, S, Donà, R, Ferretti, A, Galli, D, Giacobbe, B, Marconi, U, Piccinini, M, Poli, M, Cesari, N S, Spighi, R, Vagnoni, V, Vecchi, S, Vigotti, F, Villa, M, Vitale, A, Zoccoli, A, Corradini, M, Donzella, A, Lodi-Rizzini, E, Venturelli, L, Zenoni, A, Cicalò, C, Masoni, A, Mauro, S, Puddu, G, Serci, S, Temnikov, P, Usai, G L, Gorchakov, O E, Prakhov, S N, Rozhdestvensky, A M, Sapozhnikov, M G, Tretyak, V I, Gianotti, P, Guaraldo, C, Lanaro, A, Lucherini, V, Nichitiu, F, Petrascu, C, Ableev, V, Cavion, C, Gastaldi, Ugo, Lombardi, M, Maron, G, Vannucci, L, Vedovato, G, Bendiscioli, G, Filippini, V, Fontana, A, Montagna, P, Rotondi, A, Salvini, P, Scoglio, C, Pauli, G, Tessaro, S, Santi, L
Lenguaje:eng
Publicado: 1999
Materias:
Nuclear Physics - Experiment
Acceso en línea:https://dx.doi.org/10.1016/S0375-9474(99)00157-8
http://cds.cern.ch/record/778163
Descripción
Sumario:The results of a study of the annihilation reactions nbarp -> phi pi sup + and nbarp -> omega pi sup + are reported; the data were collected by the OBELIX apparatus, with antineutrons annihilating in flight (momenta from approx 50 MeV/c to 405 MeV/c). Annihilation frequencies and annihilation cross sections have been deduced, for both channels, as a function of antineutron momentum. From the cross section ratio, a substantial deviation from OZI rule expectations is observed. An sbars quark content in the nucleon offers a fairly plausible explanation for such an effect.

Ejemplares similares