34 citations · 34 across the 2 of their papers we have counts for
9 papers
Scalar-isoscalar mesons in pion production at threshold
Claudio M. Maekawa, Carlos A. da Rocha
We present the contributions of the non-linear chiral scalar field S to cross sections of and reactions at threshold. We compare our res…
The N N -> NN pi+ Reaction near Threshold in a Chiral Power Counting Approach
C. A. da Rocha, G. A. Miller, U. van Kolck
Power-counting arguments are used to organize the interactions contributing to the N N -> d pi, p n pi reactions near threshold. We estimate the contributions from the three formal…
NN Scattering: Chiral Predictions for Asymptotic Observables
Jean-Louis Ballot, Manoel R. Robilotta, Carlos A. da Rocha
We assume that the nuclear potential for distances larger than 2.5 fm is given just by the exchanges of one and two pions and, for the latter, we adopt a model based on chiral symm…
Ghost poles in the nucleon propagator in the linear-sigma model approach and its role in pion-nucleon low-energy theorems
C. A. da Rocha, G. Krein, L. Wilets
Complex mass poles, or ghost poles, are present in the Hartree-Fock solution of the Schwinger-Dyson equation for the nucleon propagator in renormalizable models with Yukawa-type me…
Two-Pion Exchange Nucleon-Nucleon Potential: Model Independent Features
Manoel R. Robilotta, Carlos A. da Rocha
A chiral pion-nucleon amplitude supplemented by the HJS subthreshold coefficients is used to calculate the the long range part of the two-pion exchange nucleon-nucleon potential. I…
The role of chiral symmetry in two-pion exchange nuclear potential
C. A. da Rocha, M. R. Robilotta, J. L. Ballot
We evaluate the two pion exchange contribution to the nucleon-nucleon potential in configuration space using a "minimal chiral model" containing only pions and nucleons. We argue t…