Isospin dependence of the eta' meson production in nucleon--nucleon collisions

Details Isospin dependence of the eta' meson production in nucleon--nucleon collisions Isospin dependence of the eta' meson production in nucleon--nucleon collisions

2005-07-18

arxiv.org/abs/hep-ex/0507076v1

AIP Conf.Proc.796:164-167,2005

Physics

High Energy Physics

High Energy Physics - Experiment

Presented at LEAP05: International conference on Low Energy Antiproton Physics, Bonn - Juelich, Germany, May 16-22, 2005

Scientific paper

10.1063/1.2130156

According to the quark model, the masses of eta and eta' mesons should be almost equal. However, the empirical values of these masses differ by more than the factor of two. Similarly, though the almost the same quark-antiquark content, the total cross section for the creation of these mesons close to the kinematical thresholds in the pp --> ppX reaction differs significantly. Using the COSY-11 detection setup we intend to determine whether this difference will also be so significant in the case of the production of these mesons in the proton-neutron scattering. Additionally, the comparison of the pp --> pp eta' and pn --> pn eta' total cross sections will allow to learn about the production of the eta' meson in the channels of isospin I = 0 and I = 1 and to investigate aspects of the gluonium component of the eta' meson.

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