Level crossing of particle-hole and mesonic modes in eta-mesonic nuclei

被引：38

作者：

Jido, D. ^{[1
]}

Kolomeitsev, E. E. ^{[1
,2
,3
]}

Nagahiro, H. ^{[4
]}

Hirenzaki, S. ^{[5
]}

机构：

[1] Kyoto Univ, Yukawa Inst Theoret Phys, Kyoto 6068502, Japan

[2] Univ Minnesota, Sch Phys & Astron, Minneapolis, MN 55455 USA

[3] Gesell Schwerionenforsch GSI, D-64291 Darmstadt, Germany

[4] Osaka Univ, RCNP, Osaka 5670047, Japan

[5] Nara Womens Univ, Dept Phys, Nara 6308506, Japan

来源：

NUCLEAR PHYSICS A | 2008年 / 811卷 / 1-2期

基金：

日本学术振兴会;

关键词：

Eta mesonic nucleus; Energy dependent potential; Chiral symmetry; Chiral doublets; N(1535); Eta nucleon interaction;

D O I：

10.1016/j.nuclphysa.2008.07.012

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

We study eta-meson properties in the infinite nuclear matter and in atomic nuclei with an emphasis on effects of the eta coupling to N*(1535)-nucleon-hole modes. The N* (1535) resonance, which dominates the low-energy eta-nucleon scattering, can be seen as a chiral partner of the nucleon. The change of the chiral mass gap between the N* and the nucleon in a nuclear medium has an impact on the properties of the eta-nucleus system. If the N*-nucleon mass gap decreases with a density increase (chiral symmetry restoration) the calculations show the existence of the resonance state at the energy about 60 MeV and two bound eta-nucleus states with the binding energies about -80 MeV. These states can have strong effect on predicted cross sections of the C-12(gamma, p)B-11 reaction with eta-meson production. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：158 / 178

页数：21

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