https://doi.org/10.1140/epja/s10050-024-01365-9
Regular Article - Theoretical Physics
Microscopic parametrization of the near threshold oscillations of the nucleon time-like effective electromagnetic form factors
1
Dipartimento di Fisica e Geologia, INFN Sezione di Perugia, 06123, Perugia, Italy
2
INFN Sezione di Perugia, 06123, Perugia, Italy
3
National Science Centre, Kharkov Institute of Physics and Technology, Akademicheskaya, Kharkiv, Ukraine
4
DPhN, IRFU, CEA, Université Paris-Saclay, 91191, Gif-sur-Yvette Cedex, France
Received:
20
February
2024
Accepted:
17
June
2024
Published online:
11
July
2024
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 
-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.
© The Author(s) 2024
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