Pion-delta sigma-term
/ Authors
/ Abstract
We use a simple configuration space chiral model to evaluate nucleon and {delta}{sigma}-terms. Analytic expressions are consistent with chiral counting rules and give rise to expected nonanalytic terms in the chiral limit. We obtain the results 43 MeV {<=}{sigma}{sub N}{<=} 49 MeV and 28 MeV {<=}{sigma}{sub {delta}}{<=} 32 MeV, depending on the {pi}N{delta} and {pi}{delta}{delta} coupling constants used, which are compatible with values extracted from experiment and produced by other groups.
Journal: Physical Review C