Near threshold production of the pseudoscalar mesons at the COSY-11 facility

Abstract

We summarise measurements of the COSY-11 collaboration concerning the excitation functions of the near threshold pseudoscalar meson production in the proton-proton interaction. The results are discussed in the context of the meson-nucleon and hyperon-nucleon interactions. We conclude that the $\eta$-proton interaction is significantly stronger than the eta'-proton interaction. Similarly, we found that the hyperon Lambda interacts with the nucleon considerably stronger than the hyperon Sigma, and that the interaction of (K-)-proton is much stronger than this of the (K+)-proton.

3 pages, 3 figures, Presented at the Workshop on the physics of excited nucleons (NSTAR 2007), 5-8 September 2007, Bonn, Germany

References in corpus (6)

• Energy dependence of the Lambda/Sigma0 production cross section ratio in proton proton interactions
• Kaon pair production close to threshold
• Threshold hyperon production in proton-proton collisions at COSY-11
• Towards an understanding of the light scalar mesons
• Drift chamber with a c-shaped frame
• COSY-11: an experimental facility for studying meson production in free and quasi-free nucleon-nucleon collisions