Level Crossing of N*(1535)-hole and &amp;eta; Modes and Partial Restoration of Chiral Symmetry in &amp;eta;mesic Nuclei

H.Nagahiro; D.Jido; E.E.Kolomeitsev; S.Hirenzaki

doi:10.11804/NuclPhysRev.26.S1.100

H.Nagahiro, D.Jido, E.E.Kolomeitsev, S.Hirenzaki. Level Crossing of N*(1535)-hole and η Modes and Partial Restoration of Chiral Symmetry in ηmesic Nuclei[J]. Nuclear Physics Review, 2009, 26(S1): 100-103. DOI: 10.11804/NuclPhysRev.26.S1.100

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Level Crossing of N*(1535)-hole and η Modes and Partial Restoration of Chiral Symmetry in ηmesic Nuclei

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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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Level Crossing of N*(1535)-hole and &eta; Modes and Partial Restoration of Chiral Symmetry in &eta;mesic Nuclei

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Level Crossing of N*(1535)-hole and η Modes and Partial Restoration of Chiral Symmetry in ηmesic Nuclei