Comparison of the extended linear sigma model and chiral perturbation theory

Details Comparison of the extended linear sigma model and chiral perturbation theory Comparison of the extended linear sigma model and chiral perturbation theory

2005-06-13

arxiv.org/abs/nucl-th/0506038v2

Phys.Rev. C72 (2005) 038201

Physics

Nuclear Physics

Nuclear Theory

7 pages

Scientific paper

10.1103/PhysRevC.72.038201

The pion-nucleon scattering amplitudes are calculated in tree approximation with the use of the extended linear sigma model (ELSM) as well as heavy baryon chiral perturbation theory (HB$\chi$PT), and the non-relativistic forms of the ELSM results are compared with those of HB$\chi$PT. We find that the amplitudes obtained in ELSM do not agree with those derived from the more fundamental effective approach, HB$\chi$PT.

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