4 papers
Neutral and charged pion production in the S-matrix approach
V. Malafaia, M. T. Pena, J. Adam
The S-matrix approach is applied to charged and neutral pion production in pp collisions, in which the spin/isospin channels filter differently the rescattering mechanism. The chir…
Relativistic NN scattering without partial wave decomposition
G. Ramalho, A. Arriaga, M. T. Pena
We consider the covariant Spectator equation with a One Boson Exchange (OBE) kernel, and apply it to the NN system. Relativistic effects such as retardation and negative-energy sta…
Pion re-scattering in pi0 production near threshold
V. Malafaia, M. T. Pena
We compare the most used approximations to calculate the contribution from pion re-scattering mechanisms to pion production from proton-proton scattering, near threshold. Our calcu…
The Dynamical Structure of the Delta-Resonance and its Effect on Two- and Three-Nucleon Systems
G. Kortemeyer, M. T. Pena, P. U. Sauer +1
The pion-nucleon interaction in the P33 partial wave is assumed to proceed simultaneously through the excitation of the Delta-isobar and through a phenomenologically introduced non…