The results of a study of the annihilation reactions anti-n p → ϕ π+ and anti-n p → ω π+ are reported; the data were collected by the OBELIX apparatus, with antineutrons annihilating in flight (momenta from ~ 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 anti-s s quark content in the nucleon offers a fairly plausible explanation for such an effect.

Filippi, A., Agnello, M., Balestra, F., Bergo, D., Botta, E., Bressani, T., et al. (1999). Study of anti-n p → ϕ π+ and anti-n p → ω π+ Annihilation Reactions in Flight. NUCLEAR PHYSICS. A, 655(3-4), 453-494 [10.1016/S0375-9474(99)00157-8].

Study of anti-n p → ϕ π+ and anti-n p → ω π+ Annihilation Reactions in Flight

Bertin, A;Capponi, M;De Castro, S;Donà, R;Galli, D;Semprini Cesari, N;Vigotti, F;Villa, M;Vitale, A;Zoccoli, A;
1999

Abstract

The results of a study of the annihilation reactions anti-n p → ϕ π+ and anti-n p → ω π+ are reported; the data were collected by the OBELIX apparatus, with antineutrons annihilating in flight (momenta from ~ 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 anti-s s quark content in the nucleon offers a fairly plausible explanation for such an effect.
1999
Filippi, A., Agnello, M., Balestra, F., Bergo, D., Botta, E., Bressani, T., et al. (1999). Study of anti-n p → ϕ π+ and anti-n p → ω π+ Annihilation Reactions in Flight. NUCLEAR PHYSICS. A, 655(3-4), 453-494 [10.1016/S0375-9474(99)00157-8].
Filippi, A; Agnello, M; Balestra, F; Bergo, D; Botta, E; Bressani, T; Bussa, MP; Busso, L; Calvo, D; Cerello, P; Costa, S; Denisov, O; Fanara, C; Feli...espandi
File in questo prodotto:
Eventuali allegati, non sono esposti

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/954754
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo

Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 21
  • ???jsp.display-item.citation.isi??? 17
social impact