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Production of eta mesons in nucleon-nucleon collisions

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arxiv nucl-th/0212014 v1 pith:24MWX3Y7 submitted 2002-12-03 nucl-th

V. Baru , A.M. Gasparyan , J. Haidenbauer , C. Hanhart , A.E. Kudryavtsev , J. Speth This is my paper · ORCID
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keywords productiondatamesonsnear-thresholdtakenacceleratoraccountagreement
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A microscopic calculation of near-threshold eta-meson production in the reaction NN -> NNeta is presented. It is assumed that the eta meson is produced via direct emission and via elementary rescattering processes MN -> etaN of various mesons M = pi, rho, etc. As a novel feature the amplitudes for the latter production mechanism are taken from a multi-channel meson-exchange model of the pi N system developed by the Juelich group which contains explicitly the channels pi N, rho N, eta N, sigma N, and pi Delta. Furthermore, effects of the NN interaction in the final as well as in the initial state are taken into account microscopically. Our results are compared with recent data from the COSY and CELSIUS accelerator facilities. Reasonable agreement with available near-threshold cross section data for the reactions pp -> ppeta, pn -> pneta, and pn -> deta is found.

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  1. Exclusive $\eta$ production in proton-proton collisions at energies available at the GSI Facility for Antiproton and Ion Research

    hep-ph 2025-01 conditional novelty 5.0 of 10

    A phenomenological model with N(1535) dominance and rho-exchange excitation reproduces existing pp to pp eta data and predicts cross sections for HADES, PANDA, and SIS100.

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