Formation of eta-mesic nuclei by (pi,N) reaction and N*(1535) in medium - INSPIRE

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Formation of eta-mesic nuclei by (pi,N) reaction and N*(1535) in medium

Nov, 2008

12 pages

Published in:

Phys.Rev.C 80 (2009) 025205

e-Print:

0811.4516 [nucl-th]

DOI:

10.1103/PhysRevC.80.025205

Report number:

RCNP-TH08022,
YITP-08-92

View in:

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Abstract: (arXiv)

We calculate formation spectra of eta-nucleus systems in (pi,N) reactions with nuclear targets, which can be performed at existing and/or forthcoming facilities, including J-PARC, in order to investigate eta-nucleus interactions. Based on the N^*(1535) dominance in the eta N system, eta-mesic nuclei are suitable systems for study of in-medium properties of the N^*(1535) baryon resonance, such as reduction of the mass difference of N and N^* in nuclear medium, which affects level structure of the eta and N^*-hole modes. We find that clear information on the in-medium N^*- and eta-nucleus interactions can be obtained through the formation spectra of the eta-mesic nuclei. We also discuss the experimental feasibilities by showing several spectra of (pi,N) reactions calculated with possible experimental settings. Coincident measurements of pi N pairs from the N^* decays in nuclei help us to reduce backgrounds.

21.65.Jk
12.39.Fe
14.20.Gk
21.85.+d

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