Measurement of proton electromagnetic form factors in the time-like region using initial state radiation at BESIII

2021/02/20 by BESIII Collaboration, М. Н. Ачасов, M. Ablikim +522 · 56 citations
Physics and Astronomy · #Atomic physics #Bar (unit) #Helicity #High-Energy Particle Collisions Research #Invariant mass #Nuclear physics #Particle physics #Particle physics theoretical and experimental studies #Physics #Proton #Quantum Chromodynamics and Particle Interactions #Radiation #hep-ex

paper · pdf · doi:10.1016/j.physletb.2021.136328

published in Physics Letters B 817, 136328 (Elsevier BV)

arxiv created 2021/02/20 · openalex publication_date 2021/04/29 · arxiv updated 2021/05/05 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

The electromagnetic process e + e − → p p ¯ is studied with the initial-state-radiation technique using 7.5 fb −1 of data collected by the BESIII experiment at seven energy points from 3.773 to 4.600 GeV. The Born cross section and the effective form factor of the proton are measured from the production threshold to 3.0 GeV/ c 2 using the p p ¯ invariant-mass spectrum. The ratio of electric and magnetic form factors of the proton is determined from the analysis of the proton-helicity angular distribution.

Citations

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• Dispersion analysis of the nucleon form factors including meson continua
• Geant4 developments and applications
• Study ofe+e−→pp¯via initial-state radiation atBABAR
• Nucleon form factors and final state radiative corrections toe+e−→p¯pγ
• Review of Multibody Charm Analyses