Scalar-meson production in nucleon-nucleon collisions near threshold
Physics Department, Middle East Technical University, 06531, Ankara, Turkey
2 DAPNIA/SPhN, CEA/Saclay, 91191 , Gif-sur-Yvette Cedex, France
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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 predictions of a model, based on exchanges are also presented.
© Società Italiana di Fisica and Springer-Verlag, 2003