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.

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

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Cited by in corpus (15)

• Photoproduction of eta meson within a coupled-channels K-matrix approach
• The role of ${\Delta }^{++\ast }(1620)$ resonances in $pp\to n{K}^{+}{\Sigma }^{+}$ reaction and its important implications
• Production of Lambda and Sigma^0 hyperons in proton-proton collisions
• Threshold hyperon production in proton-proton collisions at COSY-11
• The associated photoproduction of K+ meson off proton within a coupled-channels K-matrix approach
• Phenomenology of the Lambda/Sigma^0 production ratio in pp collisions
• Eta meson production in nucleon-nucleon collisions within an effective Lagrangian model
• Photoproduction of hypernuclei within the quark-meson coupling model
• Hypernuclear production by ($\gamma ,K^{+}$) reaction within a relativistic model
• The pp -> K^+Sigma^+n cross section from missing mass spectra
• The pp->p Lambda K+ and pp->p Sigma0 K+ reactions with chiral dynamics
• Reexamination of the role of the ${\Delta }^{\ast }$ resonances in the $pp\to n{K}^{+}{\Sigma }^{+}$ reaction
• On $pp\to pK\Lambda ,NK\Sigma ,pp\varphi$ -- the basic ingredients for strangeness production in heavy ion collisions
• Production of hypernuclei with hadronic and electromagnetic probes
• Strangeness Production in Hadron Reactions