Using a quark model calibrated in the spacelike region plus analyticity relations, the paper predicts timelike hyperon form factors that agree broadly with available data, with clear exceptions for Lambda and Xi-zero, and finds that the perturbative QCD falloff begins above 30 to 50 GeV squared.
Concerning the first two points above, the literature emphasizes the role of diquarks in the baryons [6–11]
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Hyperon electromagnetic timelike elastic form factors at large $q^2$
Using a quark model calibrated in the spacelike region plus analyticity relations, the paper predicts timelike hyperon form factors that agree broadly with available data, with clear exceptions for Lambda and Xi-zero, and finds that the perturbative QCD falloff begins above 30 to 50 GeV squared.