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The properties of eta-nucleus interaction and their experimental consequencesare investigated with eta-nucleus optical potentials obtained by postulatingthe N*(1535) dominance for eta-N system. The N*(1535) properties in nuclearmedium are evaluated by two kinds of chiral effective models based on distinctpictures of N*(1535). We find that these two models provide qualitativelydifferent optical potentials of the eta meson, reflecting the in-mediumproperties of N*(1535) in these models. In order to compare these models inphysical observables, we calculate spectra of (d,3He) reactions for the etamesic nucleus formation with various kinds of target nuclei. We show that the(d,3He) spectra obtained in these models are significantly different and areexpected to be distinguishable in experiments.Comment: 24 pages, 8 figure

physical review. c. nuclear physics/physical review. c, nuclear physics

<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>η</mml:mi></mml:math>-nucleus interactions and in-medium properties of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mrow><mml:mi>N</mml:mi></mml:mrow><mml:mrow><mml:mi>*</mml:mi></mml:mrow></mml:msup></mml:mrow><mml:mn /><mml:mo>(</mml:mo><mml:mn>1535</mml:mn><mml:mo>)</mml:mo><mml:mn /></mml:math>in chiral models

η-nucleus interactions and in-medium properties ofN*(1535)in chiral models