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arxiv: hep-ph/0507147 · v1 · submitted 2005-07-12 · ✦ hep-ph

Pion-delta sigma-term

classification ✦ hep-ph
keywords chiraldeltasigmaanalyticcloseconfigurationconsistentcounting
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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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