New fit of time-like proton electromagnetic form factors from $e^{+}{e}^{-}$ colliders

Abstract

The data on the proton form factors in the time-like 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 ratio and the angular asymmetry of the annihilation reaction $e^{+}{e}^{-}\to \bar{p}p$ are discussed. Fiits 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 time-like form factors from the threshold up to the highest momenta.

20 pages, 7 figures

References in corpus (8)

• Dispersion analysis of the nucleon form factors including meson continua
• Nucleon Electromagnetic Form Factors in the Timelike Region
• Unexpected features of e+e-->ppbar and e+e-->lambda-lambdabar cross sections near threshold
• Periodic interference structures in the time-like proton form factor
• Study of the process $e^{+}{e}^{-}\to p\bar{p}$ via initial state radiation at BESIII
• Testing axial and electromagnetic nucleon form factors in time-like regions in the processes $\bar{p}+n\to {\pi }^{-}+{\ell }^{-}+{\ell }^{+}$ and $\bar{p}+p\to {\pi }^0+{\ell }^{-}+{\ell }^{+}$, $\ell =e$, $\mu$
• The fourth dimension of the nucleon structure: spacetime analysis of the timelike electromagnetic proton form factors
• Comments on ISR method in modern experiment and influence of final state radiation

Cited by in corpus (2)

• Dispersion-theoretical analysis of the electromagnetic form factors of the nucleon: Past, present and future
• Proton Electromagnetic Form Factors in the Time-like Region through the Scan Technique