@misc{10481/107689,
year = {2025},
month = {7},
url = {https://hdl.handle.net/10481/107689},
abstract = {The transverse charge density of the pion is extracted from a dispersive analysis of the e+e− → π+π− exclusive annihilation data. A logarithmic dispersion relation is used to compute the unknown phase of the timelike pion form factor from the modulus obtained from the annihilation cross section. The method is model-independent and permits quantitative uncertainty estimates. The density is obtained with few-percent accuracy down to b ∼ 0.1 fm; at smaller distances it depends qualitatively on the assumed high-energy behavior of the timelike form factor. Implications for pion structure and the relevance of pQCD asymptotics are discussed.},
organization = {U.S. Department of Energy, Office of Science, Office of Nuclear Physics – (Contract DE-AC05-06OR23177)},
organization = {MICIU/AEI/10.13039/501100011033 and ERDF/EU – (PID2020-114767GB-I00, PID2023-147072NB-I00)},
organization = {Junta de Andalucía – (POSTDOC_21_00136, FQM225)},
publisher = {Elsevier},
keywords = {Pion form factor},
keywords = {Dispersion relations},
keywords = {Annihilation experiments},
title = {Pion transverse charge density from e+ e− annihilation data and logarithmic dispersion relations},
doi = {10.1016/j.physletb.2025.139585},
author = {Ruiz Arriola, Enrique and Sanchez-Puertas, Pablo and Weiss, Christian},
}