The results of a study of the annihilation reactions and 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 quark content in the nucleon offers a fairly plausible explanation for such an effect.

Study of anti-n.p -> phi.pi+ and anti-n.p -> omega.pi+ annihilation reactions in flight / A., F., Agnello, M., F., B., D., B., E., B., T., B., M. P., B., L., B., D., C., P., C., S., C., O., D., C., F., A., F., L., F., R., G., A., G., Iazzi, F., A., M., S., M., et al.. - In: NUCLEAR PHYSICS. A. - ISSN 0375-9474. - 655:3-4(1999), pp. 453-494. [10.1016/S0375-9474(99)00157-8]

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

AGNELLO, MICHELANGELO;IAZZI, Felice;MINETTI, Bruno;
1999

Abstract

The results of a study of the annihilation reactions and 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 quark content in the nucleon offers a fairly plausible explanation for such an effect.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11583/1845772
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