OBELIX
NBAR P --> PHI PI+
[1.892]
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Study of anti-n p --> phi pi+ and anti-n p --> omega pi+ annihilation reactions in flight.

The OBELIX collaboration Filippi, A. ; Agnello, M. ; Balestra, F. ; et al.
Nucl.Phys.A 655 (1999) 453-494, 1999.
Inspire Record 512679 DOI 10.17182/hepdata.36158

The results of a study of the annihilation reactions n p → θπ + and n p → ωπ + 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 s s quark content in the nucleon offers a fairly plausible explanation for such an effect.

2 data tables
Table 1

No description provided.

Table 2

No description provided.