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

被引：1

作者：

Rosini, Francesco ^{[1
]}

Pacetti, Simone ^{[1
]}

Shekhovtsova, Olga ^{[2
,3
]}

Tomasi-Gustafsson, Egle ^{[4
]}

机构：

[1] INFN, Sez Perugia, Dipartimento Fis & Geol, I-06123 Perugia, Italy

[2] INFN, Sez Perugia, I-06123 Perugia, Italy

[3] Kharkov Inst Phys & Technol, Natl Sci Ctr, Kharkiv, Ukraine

[4] Univ Paris Saclay, DPhN, IRFU, CEA, F-91191 Gif Sur Yvette, France

来源：

EUROPEAN PHYSICAL JOURNAL A | 2024年 / 60卷 / 07期

关键词：

Approximation theory;

D O I：

10.1140/epja/s10050-024-01365-9

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

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\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$Q<^>2$$\end{document}-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.

引用

页数：9

共 21 条

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