Hyperon production in near threshold nucleon-nucleon collisions

Details Hyperon production in near threshold nucleon-nucleon collisions Hyperon production in near threshold nucleon-nucleon collisions

2005-12-02

arxiv.org/abs/nucl-th/0512007v3

Phys.Rev. C73 (2006) 035211

Physics

Nuclear Physics

Nuclear Theory

16 pages, 4 figures, one new table added and dicussions are updated, version accepted for publication by Physical Review C

Scientific paper

10.1103/PhysRevC.73.035211

We study the mechanism of the associated Lambda-kaon and Sigma-kaon production in nucleon-nucleon collisions over an extended range of near threshold beam energies within an effective Lagrangian model, to understand of the new data on pp --> p Lambda K+ and pp --> p Sigma0 K+ reactions published recently by the COSY-11 collaboration. In this theory, the hyperon production proceeds via the excitation of N*(1650), N*(1710), and N*(1720) baryonic resonances. Interplay of the relative contributions of various resonances to the cross sections, is discussed as a function of the beam energy over a larger near threshold energy domain. Predictions of our model are given for the total cross sections of pp --> p Sigma+K0, pp --> n Sigma+K+, and pn --> n Lambda K+ reactions.

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