Meson production in nucleon--nucleon collisions close to the threshold

Abstract

The last decade has witnessed great experimental progress that has led to measurements of cross sections--polarized as well as unpolarized--of of high accuracy in several $NN\to NNx$ reaction channels. These data, naturally, pose challenges to theorists to develop methods by which they can be understood and explained in commensurate detail. In this work we review the status of the theory with special emphasis on model--independent methods. We discuss in detail not only the many observables involved in the reactions, but also the physical questions that can be addressed by studying them in the various reaction channels. The special advantages of nucleon--nucleon induced reactions are stressed. Foremost among these is the use of the initial and final states as a spin/isospin filter. This opens, for example, a window into the spin dependence of the hyperon--nucleon interaction and the dynamics of the light scalar mesons.

Typos corrected, discussion on polarization observables extended; version as accepted by Physics Reports

References in corpus (5)

• Evidence that the a0(980) and f0(980) are not elementary particles
• Phenomenology of pp->pp eta reaction close to threshold
• Final state interaction in the reaction NN -> eta NN
• Upper limit for the cross section of the overlapping scalar resonances f0(980) and a0(980) produced in proton-proton collisions in the range of the reaction threshold
• Investigation of light scalar resonances at COSY

Cited by in corpus (145)

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• Extraction of the strong neutron-proton mass difference from the charge symmetry breaking in pn-->d pi0
• Description of intermediate- and short-range NN nuclear force within a covariant effective field theory
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