The data on the proton form factors in the timelike region from the BaBar, BESIII, and CMD-3 Collaborations are examined to have coherent pieces of information on the proton structure. Oscillations in the annihilation cross section, previously observed, are determined with better precision. The moduli of the individual form factors, determined for the first time, their ratios, and the angular asymmetry of the annihilation reaction $e^{+}{e}^{-}\to \overline{p}p$ are discussed. Fits of the available data on the cross section, the effective form factor, and the form factor ratio, allow to propose a description of the electric and magnetic timelike form factors from the threshold up to the highest momenta.

• Received 29 December 2020
• Accepted 22 February 2021

DOI:https://doi.org/10.1103/PhysRevC.103.035203

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Published by the American Physical Society