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arXiv · 2403.02916

Microscopic parametrization of the near threshold oscillations of the nucleon time-like effective electromagnetic form factors

Francesco Rosini·Simone Pacetti·Olga Shekhovtsova·Egle Tomasi-Gustafsson
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Abstract

We present an analysis of the recent near threshold BESIII data for the nucleon time-like effective form factors. The damped oscillation emerging from the subtraction of the dipole formula is treated in non-perturbative-QCD, making use of the light cone distribution amplitudes expansion. Non-perturbative effects are accounted for by considering Q2-dependent coefficients in such expansions, whose free parameters are determined by fitting to the proton and neutron data. Possible implications and future analysis have been discussed.

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Francesco Rosini, Simone Pacetti, Olga Shekhovtsova, Egle Tomasi-Gustafsson. 2024-03-05. Microscopic parametrization of the near threshold oscillations of the nucleon time-like effective electromagnetic form factors. https://doi.org/10.1140/epja%2Fs10050-024-01365-9

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