Abstract

Preliminary data on the total and differential cross sections of the reaction π−p → ηn, obtained in 1998 by the Crystal Ball Collaboration, are presented. It is possible to see that the angular distribution at momenta near the threshold (685 MeV/c) is consistent with the S‐wave dominance. From the momentum of 720 MeV/c, the P‐wave contribution can be found.

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