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In-medium modifications of the S11(1535) resonance and eta photoproduction

J. Lehr·M. Post·U. Mosel
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Abstract

We investigate the influence of possible in-medium modifications of the S11(1535) in eta photoproduction in nuclei. Besides Fermi motion, Pauli blocking and binding effects also collisional broadening is accounted for. The in-medium width is obtained from a realistic resonance-hole model. Results on eta photoproduction are obtained from a semi-classical BUU transport model and compared with data. We find that calculations including a momentum dependent nucleon and resonance potential are in agreement with the recent KEK data. In contrast, collisional broadening has only little influence.

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J. Lehr, M. Post, U. Mosel. 2003-09-05. In-medium modifications of the S11(1535) resonance and eta photoproduction. https://doi.org/10.1103/physrevc.68.044601

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