Hadronic interaction of eta and eta-prime mesons with nucleons

Abstract

Due to their short life-time, flavour-neutral mesons cannot be utilized as free secondary beams or targets, and therefore a study of their interaction with nucleons is not possible via direct scattering experiments. This interaction is, however, accessible via its influence on the energy dependence - and on the phase space distributions of the cross sections for reactions in which these mesons are produced. In case of the p p --> p p eta reaction the experimentally determined distributions of the differential cross sections close to the production threshold cannot be described by taking into account the S-wave proton-proton and proton-eta interaction only. Here we show that the angular distributions determined at the COSY-11 facility reveal some evidence for P-wave admixture in the proton-proton subsystem already at an excess energy as low as Q = 15.5 MeV. We also present that one can estimate the relative strength of the eta-nucleon and eta-prime-nucleon interactions by comparison of the eta and eta-prime production yield.

arXiv comment4 pages, 3 figures, Talk given at 16th International Conference on Particles and Nuclei (PANIC 02), Osaka, Japan, 30 Sep - 4 Oct 2002

References in corpus (7)

• Comparison of eta and eta' production in the pp -> pp eta(eta') reactions near threshold
• Close-to-threshold Meson Production in Hadronic Interactions
• Near-Threshold eta Meson Production in Proton-Proton Collisions
• ${\eta }^{\prime }$ production in proton-proton scattering close to threshold}
• Energy Dependence of the Near-Threshold Total Cross-Section for the pp --> pp eta' Reaction
• S-wave eta'-proton FSI; phenomenological analysis of near-threshold production of pi0, eta, and eta' mesons in proton-proton collisions
• Production of $\eta \prime$ Mesons in the $pp\to pp\eta \prime$ Reaction at 3.67 GeV/c

Cited by in corpus (7)

• Etaprime and Eta Mesons with Connection to Anomalous Glue
• Kaon pair production close to threshold
• Pseudoscalar Meson Decay Constants and Couplings, the Witten-Veneziano Formula beyond large N_c, and the Topological Susceptibility
• Eta and eta' mesons production at COSY-11
• First close-to-threshold measurement of the analyzing power Ay in the reaction p(pol)p -> pp eta
• The U(1)_A Anomaly and QCD Phenomenology
• Hadronic production of eta--mesons: recent results and open questions