Hyperon production in near threshold nucleon-nucleon collisions
Abstract
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.
Keywords
Cite
@article{arxiv.nucl-th/0512007,
title = {Hyperon production in near threshold nucleon-nucleon collisions},
author = {Radhey Shyam},
journal= {arXiv preprint arXiv:nucl-th/0512007},
year = {2009}
}
Comments
16 pages, 4 figures, one new table added and dicussions are updated, version accepted for publication by Physical Review C