Physics – Nuclear Physics – Nuclear Theory
Scientific paper
2001-02-14
Phys.Rev.C65:065202,2002
Physics
Nuclear Physics
Nuclear Theory
22 pages with figs
Scientific paper
10.1103/PhysRevC.65.065202
Results of a combined analysis are presented for the production of $\omega$ and $\phi$ mesons in $\pi N$ reactions in the near-threshold region using throughoutly a conventional ''non-strange'' dynamics based on such processes which are allowed by the non-ideal $\omega-\phi$ mixing. We show that strong interferences of the $t$ (meson exchange) and $s$ and $u$ (nucleon and nucleon resonance) channels differ significantly in $\omega$ and $\phi$ production amplitudes. This leads to a decrease of the relative yields in comparison with expectations based on one-channel models with standard $\omega - \phi$ mixing. We find a strong and non-trivial difference between observables in $\omega$ and $\phi$ production reactions caused by the different role of the nucleon and nucleon resonance amplitudes. A series of predictions for the experimental study of this effect is presented.
Kampfer Burkhard
Reznik B. L.
Titov Alexander I.
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