Chiral dynamics of the S11(1535) and S11(1650) resonances revisited

Details Chiral dynamics of the S11(1535) and S11(1650) resonances revisited Chiral dynamics of the S11(1535) and S11(1650) resonances revisited

2010-12-10

arxiv.org/abs/1012.2233v1

Phys.Lett.B697:254-259,2011

Physics

Nuclear Physics

Nuclear Theory

7 pages, 5 figures, version to be published in PLB

Scientific paper

10.1016/j.physletb.2011.02.008

We analyze s-wave pion-nucleon scattering in a unitarized chiral effective
Lagrangian including all dimension two contact terms. We find that both the
S11(1535) and the S11(1650) are dynamically generated, but the S31(1620) is
not. We further discuss the structure of these dynamically generated
resonances.

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