Onset of scaling violation in pion and kaon elastic electromagnetic form factors

Using a symmetry-preserving truncation of the quantum field equations describing hadron properties, parameterfree predictions are delivered for pion and kaon elastic electromagnetic form factors, F-P=pi,F-K, thereby unifying them with kindred results for nucleon elastic electromagnetic form factors. Regarding positive -charge states, the analysis stresses that the presence of scaling violations in QCD entails that Q(2)F(P)(Q(2)) should exhibit a single maximum on Q(2) > 0. Locating such a maximum is both necessary and sufficient to establish the existence of scaling violations. The study predicts that, for charged pi, K mesons, the Q(2)F(P)(Q(2)) maximum lies in the neighbourhood Q(2) similar or equal to 5 GeV2. Foreseeable experiments will test these predictions and, providing their Q(2) reach meets expectations, potentially also provide details on the momentum dependence of meson form factor scaling violation.