12 citations · 18 across the 6 of their papers we have counts for
6 papers
Numerical Evolution from the Hamiltonian
José M. L. Amoreira, Luís J. M. Amoreira
We propose a numerical method for approximate calculations of the time evolution of point particle systems given only the system's Hamiltonian function and initial conditions. The…
Direct calculation of the K-matrix for pion electro-production in the Delta channel
P. Alberto, L. Amoreira, M. Fiolhais +2
We present a method to calculate directly the K-matrices for the pion electro-production processes in the framework of chiral quark models which allows for a clean separation of th…
N-Delta axial transition form factors
B. Golli, L. Amoreira, M. Fiolhais +1
We review some basic properties of the N-Delta transition axial amplitudes and relate them to the strong pi-N-Delta form-factor. In models with the pion cloud we derive a set of co…
Axial currents in electro-weak pion production at threshold and in the Delta-region
S. Sirca, L. Amoreira, M. Fiolhais +1
We discuss electro-magnetic and weak production of pions on nucleons and show how results of experiments and their interpretation in terms of chiral quark models with explicit meso…
Axial Excitation of the Delta in Chiral Quark Models
S. Sirca, L. Amoreira, M. Fiolhais +1
We discuss electro-magnetic and weak axial N-Delta transition amplitudes in the linear sigma-model and the Cloudy-Bag Model as typical representatives of chiral quark models. We sh…
Axial amplitudes for Delta excitation in chiral quark models
B. Golli, S. Sirca, L. Amoreira +1
We study the axial amplitudes for the N-Delta transition in models with quarks and chiral mesons. A set of constraints on the pion field is imposed which enforces PCAC and the off-…