Role of N*(1650) in the near threshold pp --> p Lambda K+ and pp --> p Sigma0 K+ reactions

Abstract

We investigate the pp --> p Lambda K+ and pp --> p Sigma0 K+ reactions at beam energies near their thresholds within an effective Lagrangian model, where the strangeness production proceeds via the excitation of N*(1650), N*(1710), and N*(1720) baryonic resonances. It is found that the $N^{\ast }$(1650) resonance dominates both these reactions at near threshold energies. The contributions from this resonance together with the final state interaction among the outgoing particles are able to explain the observed beam energy dependence of the ratio of the cross sections of the two reactions in the near threshold region.

Revised version, Fig. 4 is updated with the revised data, to appear in Phys. Rev. C (Rapid Communications)

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Cited by in corpus (21)

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• Role of baryonic resonances in the dilepton emission in nucleon-nucleon collisions
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• Threshold hyperon production in proton-proton collisions at COSY-11
• Dilepton production in proton-proton and quasifree proton-neutron reactions at 1.25 GeV
• The associated photoproduction of K+ meson off proton within a coupled-channels K-matrix approach
• Analysis of the Lambda p Final State Interaction in the Reaction p+p->K^+(Lambda p)
• Phenomenology of the Lambda/Sigma^0 production ratio in pp collisions
• Eta meson production in nucleon-nucleon collisions within an effective Lagrangian model
• A relativistic two-nucleon model for $A(p,K^{+}){}_{\Lambda }B$ reaction
• Hyperon production in near threshold nucleon-nucleon collisions
• Exclusive $K^{+}$ production in proton-nucleus collisions
• Comment on "Mass and KΛCoupling of the N*(1535)"
• Strangeness Production Process $pp\to n{K}^{+}{\Sigma }^{+}$ within Resonance Model
• Reeconstructing Sigma0 decays in STAR
• Associated strangeness production at threshold
• Strangeness Production in Proton-Proton Collisions Close to Threshold
• Physics at COSY