224 citations · 1.6k across the 72 of their papers we have counts for
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Nucleon and gamma N -> Delta lattice form factors in a constituent quark model
G. Ramalho, M. T. Pena
A covariant quark model, based both on the spectator formalism and on vector meson dominance, and previously calibrated by the physical data, is here extended to the unphysical reg…
D-state effects in the electromagnetic N-Delta transition
G. Ramalho, M. T. Pena, Franz Gross
We consider here a manifestly covariant quark model of the nucleon and the Delta, where one quark is off-shell and the other two quarks form an on-shell diquark pair. Using this mo…
Electromagnetic form factors of the Delta in a S-wave approach
G. Ramalho, M. T. Pena
Without any further adjusting of parameters, a relativistic constituent quark model, successful in the description of the data for the nucleon elastic form factors and of the domin…
A Covariant model for the nucleon and the
G. Ramalho, M. T. Pena, Franz Gross
The covariant spectator formalism is used to model the nucleon and the (1232) as a system of three constituent quarks with their own electromagnetic structure. The definition of…