Abstract
The positive sign of theη-nucleon scattering lengthb ηN was predicted in [1] assuming the resonance mechanism for theπ −p → ηn reaction. We demonstrate that
-
(a)
the assumption about thet-channel mechanism of the reaction leads tob ηN < 0 and
-
(b)
the experimental data on theη production cross section are equally compatible with both resonance andt-channel mechanisms.
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Communicated by V.V. Anisovich