Scalar-meson production in nucleon-nucleon collisions near threshold


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Rekalo M., Tomasi-Gustafsson E.

EUROPEAN PHYSICAL JOURNAL A, cilt.18, ss.697-709, 2003 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 18 Konu: 4
  • Basım Tarihi: 2003
  • Doi Numarası: 10.1140/epja/i2003-10060-0
  • Dergi Adı: EUROPEAN PHYSICAL JOURNAL A
  • Sayfa Sayıları: ss.697-709

Özet

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 pi + sigma exchanges are also presented.