2 papers
hep-ph1998
Two-Loop Chiral Perturbation Theory and the Pion-Pion Phase Shifts
J. Sa Borges, J. Soares Barbosa, M. D. Tonasse +1
We want to test the predictive power of Chiral Perturbation Theory (ChPT). In this work, we use the ChPT pion-pion scattering amplitude, including two loop contributions, and we ob…
hep-ph1997
A vanishing cosmological constant in elementary particle theory
F. Pisano, M. D. Tonasse
The quest of a vanishing cosmological constant is considered in the simplest anomaly-free chiral gauge extension of the electroweak standard model where the new physics is limited…