Determination of nucleon and pion form factors via dispersion relations Original Research Article

A practical strategy is presented and successfully implemented to determine form factors in the time-like but unphysical (below threshold) region using dispersion relations, in a model independent way without any bias towards expected resonances. Space and time-like data have been employed along with a regularization scheme to unfold and solve the integral equations. Remarkably, resonance structures with peaks for the ϱ(770), ϱ′(1600) and a structure near the View the MathML source threshold are automatically generated. The Φ peak is invisible thus refuting suggestions about any sizeable View the MathML source content in the nucleon.