Pion-delta sigma-term

Details Pion-delta sigma-term Pion-delta sigma-term

2005-07-12

arxiv.org/abs/hep-ph/0507147v1

Phys.Rev. C72 (2005) 065207

Physics

High Energy Physics

High Energy Physics - Phenomenology

18 pages, 4 figures

Scientific paper

10.1103/PhysRevC.72.065207

We use a configuration space chiral model in order to evaluate nucleon and
delta sigma-terms. Analytic expressions are consistent with chiral counting
rules and give rise to expected non-analytic terms in the chiral limit. We
obtain the results $\sigma_N=46$ MeV and $\sigma_{\Delta}=32$ MeV, which are
very close to values extracted from experiment and produced by other groups.

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