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arxiv: nucl-th/0503022 · v2 · submitted 2005-03-09 · ⚛️ nucl-th · hep-ph

Two-scale scalar mesons in nuclei

K. Saito (1) , H. Kouno (2) , K. Tsushima (3) , A.W. Thomas (4) ((1) Department of Physics , Tokyo University of Science , Japan , (2) Department of Physics , Saga University
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(3) National Center for Theoretical Sciences at Taipei Taiwan (4) Thomas Jefferson National Accelerator Facility USA)
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classification ⚛️ nucl-th hep-ph
keywords modelsigmalinearnuclearnucleiadvantagesapproachattraction
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We generalize the linear sigma model in order to develop a chiral-invariant model of nuclear structure. The model is natural, and contains not only the usual sigma meson which is the chiral partner of the pion but also a new chiral-singlet that is responsible for the medium-range nucleon-nucleon attraction. This approach provides significant advantages in terms of its description of nuclear matter and finite nuclei in comparison with conventional models based on the linear sigma model.

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