Meson Properties in Nuclear Medium
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概要
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In this paper, we report on the properties of meson resonances in the nuclear medium, in the scalar and vector sectors. First of all, the ρ meson is studied by looking at the pion-pion scattering amplitude in the vector-isovector channel, following a chiral unitary framework in free space and in the medium. The pions are modified in the medium by means of p-h and Δ-h excitations, and the p meson couples to these components as well as to N^*(1520)-h excitations. Second, the φ meson spectrum due to the kaon channel is obtained in terms of the φ selfenergy provided by a chiral SU(3) dynamics model. The medium effects are considered in the properties of K and K mesons which are renormalized by S- and P-wave interactions with the nucleons, provided by the lowest order meson-baryon chiral effective lagrangian. Both the in-medium mass and width of the φ are obtained. Finally, the scalar resonances σ, f_0 and a_0 are studied in the medium from a coupled channel chiral unitary model for meson-meson scattering. To this respect we look at recent experimental results on the two pion photoproduction reaction in nuclei.
- 理論物理学刊行会の論文
- 2003-07-18
著者
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CABRERA Daniel
Departamento de Fisica Teorica II, Universidad Complutense
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Cabrera Daniel
Departamento De Fisica Teorica And Ific Centra Mixto Universidad De Valencia-csic Institutos De Inve
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CABRERA Daniel
Departamento de Fisica Teorica and IFIC, Centra Mixto Universidad de Valencia-CSIC, Institutos de Investigation de Paterna
関連論文
- The a_1(1260) as a ρπ Resonance in Nuclear Matter(Nuclear Physics)
- Formation of φ Mesic Nuclei(Nuclear Physics)
- Strange Meson Production at High Density and Temperature(Hadrons in Nuclei,New Frontiers in QCD 2010-Exotic Hadron Systems and Dense Matter-)
- Meson Properties in Nuclear Medium