Départment de Physique des Particules Elémentaires, CEN-Saclay, France
Abstract:
The possibility of describing the high-energy reaction π?p→π0n with two Regge trajectories (t) and '(t) is studied in more detail. These trajectories are assumed to be exactly linear in t, with (t) constrained to pass through (m2) = 1. We examine hypotheses in which (t) obeys either the Gell-Mann mechanism or the Chew mechanism, and in which '(t) is or is not a conspiring trajectory. The model is in good agreement with the data in practically all cases; greater experimental accuracy would be necessary to distinguish between the various hypothesis. Predictions are given for the neutron polarization at |t| < 1 GeV2.