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

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.

arXiv comment6 pages, 7 figures, minor changes in Fig. 4 and Sect. 3

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• Examination of $N^{\ast }(1535)$ as a probe to observe the partial restoration of chiral symmetry in nuclear matter
• Photoproduction of mesons from nuclei - In-medium properties of hadrons
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• Charged current (anti)neutrino induced eta production off the nucleon
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• Experimental Review of Baryons in the Nuclear Medium