Donoghue, JFRAMIREZ, CVALENCIA, G2024-04-262024-04-261988https://hdl.handle.net/20.500.14394/40745Published version is located at http://prd.aps.org/abstract/PRD/v38/i7/p2195_1We analyze results on π-π scattering using a framework based on nonlinear chiral Lagrangians both at the tree level and at one-loop order. Overall the data can be well understood up to energies of 0.7–0.8 GeV, as well as at threshold, and some of the Lagrangian parameters are well determined. As a side comment, we note that the Skyrmion solution is stable given this experimental fourth-order Lagrangian, but its mass is about 70% too high.Physicsarticle