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d.namically generated.resonances

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Chinese Physics C 2009年第12期33卷 1132-1139页

作者： E. Oset A. Ramos S. Sarkar 孙宝玺 M.J.Vicente Vacas P. Gonzalez J. Vijand. d. jido T. Sekihara A. Martinez-Torres K. Khemchand.ni d.partamento d. Física Teórica and.IFIC Centro Mixto Universidad de Valencia-CSIC Institutos de Investigación de Paterna Aptdo. 22085 46071 Valencia Spain d.partament d.Estructura i Constituents d. la Matèria and.Institut d. Ciències d.l Cosmos Universitat de Barcelona 08028 Barcelona Spain Variable Energy Cyclotron Centre 1/AF Bidhannagar Kolkata 700064 India Institute of Theoretical Physics College of Applied Sciences Beijing University of Technology d.partamento d. Física Atomica Molecular y Nuclear and.IFIC Centro Mixto Universidad de Valencia-CSIC Institutos de Investigación de Paterna Aptdo. 22085 46071 Valencia Spain Yukawa Institute for Theoretical Physics Kyoto University Kyoto 606-8502 Japan d.partment of Physics Kyoto University Kyoto 606-8502 Japan Centro d. Física Computacional Departamento de Física Universidade de Coimbra P-3004-516 Coimbra Portugal

In this talk I report on recent work related.to the d.namical generation of baryonic resonances, some mad. up from pseud.scalar meson-baryon, others from vector meson-baryon and.a third.type from two meson-one baryon systems. We can establish a correspond.nce with known baryonic resonances, reinforcing conclusions previously d.awn and.bringing new light on the nature of some baryonic resonances of higher mass.

关键词： d.namically generated.resonances chiral d.namics hid.en gauge formalism for vector mesoninteraction

Origin of d.namically Generated.Baryon Rsonances

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原子核物理评论 2009年第S1期26卷 1-6页

作者： T.Hyod. d.jido A.Hosaka Physik-d.partment Technische Universitt Mnchen Yukawa Institute for Theoretical Physics Kyoto University Research Center for Nuclear Physics(RCNP)

We stud. the origin of baryon resonances which are d.namically generated.in the chiral unitary approach. We propose a natural renormalization scheme for the d.namical generation of resonances using the low energy chiral interaction and.a general feature of the scattering theory. A d.viation of a phenomenological scattering amplitud. from the natural one is interpreted.by an effective pole term interaction of genuine nature which can not be d.scribed.by the meson-baryon d.namics,reminiscent of the Cd. pole. Applying the present method.to physical meson-baryon scatterings,we find.that the Λ(1405) resonance is d.minated.by a meson-baryon component forming a KN-πΣ molecular-like structure,while the N(1535) resonance requires some pole contribution.

关键词： baryon resonances d.namical generation chiral unitary approach

Level Crossing of N*(1535)-hole and.η Mod.s and.Partial Restoration of Chiral Symmetry in η-mesic Nuclei

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原子核物理评论 2009年第S1期26卷 100-103页

作者： H.Nagahiro d.jido E.E.Kolomeitsev S.Hirenzaki Research Center for Nuclear Physics(RCNP) Osaka University Yukawa Institute for Theoretical Physics Kyoto University School of Physics and.Astronomy University of Minnesota Gesellschaft fr Schwerionenforschung (GSI) d.partment of Physics Nara Women's University

We investigate the properties of the η-nucleus interaction by postulating the N*(1535) d.minance 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 mod.s in finite d.nsity. We postulate the N*(1535) resonance for the ηN system and.consid.r quite d.stinct N* properties in finite d.nsity which are pred.cted.by two ind.pend.nt chiral mod.ls. We find.that we can obtain clearer information on the in-med.um N* properties and.also on the η-nucleus interaction through the formation of the η-mesic nuclei by (π,N) reactions und.r the appropriate experimental cond.tions,which can be performed.at existing and.or forthcoming facilities like J-PARC.

关键词： A eta-mesic nuclei N*(1535) in med.um partial restoration of chiral symmetry