Scalar meson production in nucleon-nucleon collisions near threshold
Michail P. Rekalo, Egle Tomasi-Gustafsson
Abstract
We establish the model-independent spin structure of the matrix elements for the near-threshold scalar meson production in pp- and np-collisions, when the final particles are emitted in S-state. Polarization phenomena are derived in a general form. The properties of the t-channel dynamics, which is based on different meson exchanges, are studied in terms of the s-channel parametrization of the matrix element. The prediction of a 'realistic' model, based on π+σ-exchanges are also presented.
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