| Level Crossing of N~* (1535)-hole and η Modes and Partial Restoration of Chiral Symmetry in η-mesic Nuclei |
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| 作者单位： | H.Nagahiro(Research Center for Nuclear Physics (RCNP),Osaka University,Ibaraki,Osaka 567-0047,Japan);D.Jido(Yukawa Institute for Theoretical Physics,Kyoto University,Kyoto 606-8502,Japan);E.E.Kolomeitsev(School of Physics and Astronomy,University of Minnesota,116 Church Str SE,Minneapolis 55455,USA;Gesellschaft fiir Schwerionenforschung (GSI),Planck Str.1,64291 Darmstadt,Germany);S.Hirenzaki(Department of Physics,Nara Women's University,Nara 630-8506,Japan) |
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| 摘 要： | We investigate the properties of the η-nucleus interaction by postulating the N~* (1535) dominance for ηN system.Since the mass gap of N~* and N is very close to the η meson mass,there is the possibility of the level crossing between the N~*-h and η modes in finite density.We postulate the N~* (1535) resonance for the ηN system and consider quite distinct N~* properties in finite density which are predicted by two independent chiral models.We find that we can obtain clearer information on the in-medium N~* properties and also on the η-nucleus interaction through the formation of the η-mesic nuclei by (π,N) reactions under the appropriate experimental conditions,which can be performed at existing and/or forthcoming facilities like J-PARC.
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