937 research outputs found
In-medium Effects in the Eta-Photoproduction through the Resonance with the Relativistic Approach
In-medium effects in photon excitation of the S resonance from nucleon
and its decay to -meson using the RMF approach is studied. We examine the
in-medium effects by varing the Dirac fields of the nucleon and the S
resonance separately. We obtained a conclusion that the Dirac fields of the
nucleon, which reduces the nucleon effective mass, enlarge the width of
S resonance, and small Dirac-fields of the resonance shifts the peak
position, and these combined effects can explain the in-medium properties
observed in the experimental data for C(,) reaction.Comment: 10 pages and 3 figure
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