Onset of scaling violation in pion and kaon elastic electromagnetic form factors
Year: 2024
Type: article
Abstract: Using a symmetry-preserving truncation of the quantum field equations describing hadron properties, parameter-free predictions are delivered for pion and kaon elastic electromagnetic form factors, F P = π , 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 π , K mesons, the Q 2 F P ( Q 2 ) maximum lies in the neighbourhood Q 2 ≃ 5 GeV 2 . 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.
Source: Physics Letters B
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: diamond
OpenAlex ID: W4400038873