Pion-delta sigma-term
  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. 
I. P. Cavalcante, M. R. Robilotta, J. Sa Borges, D. de O. Santos, G.   R. S. Zarnauskas