Abstract:
We investigate the reactions πN↦a 0 N and pp↦da 0 + near threshold and at medium energies. An effective Lagragian approach and the Regge pole model are applied to analyze different contributions to the cross-section of the reaction πN↦a 0 N. These results are used to calculate the differential and total cross-sections of the reaction pp↦da 0 + within the framework of the two-step model in which two nucleons produce an a0-meson via π-meson exchange and fuse to a deuteron. The necessity of new measurements on a0 production and branching fractions (of its decay to the K and πη channels) is emphasized for clarifying the a0 structure. Detailed predictions for the reaction pp→da 0 + are presented for the energy regime of the proton synchrotron COSY-Jülich.
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Received: 4 August 2000 / Accepted: 17 September 2000
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Grishina, V., Kondratyuk, L., Bratkovskaya, E. et al. Production of a0-mesons in the reactions πN↦a0N and pp↦da0 + at GeV energies. Eur Phys J A 9, 277–285 (2000). https://doi.org/10.1007/s100500070045
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DOI: https://doi.org/10.1007/s100500070045