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.

arXiv comment20 pages, 7 figures

References in corpus (22)

• The ratio of proton's electric to magnetic form factors measured by polarization transfer
• Dispersion analysis of the nucleon form factors including meson continua
• Final Analysis of Proton Form Factor Ratio Data at ${\mathbf{Q}}^2=4.0$, 4.8 and 5.6 GeV${}^2$
• Spectroscopy at B-factories Using Hard Photon Emission
• Study of e+e- --> p anti-p via initial-state radiation at BABAR
• Re-analysis of the nucleon space- and time-like electromagnetic form factors in a two-component model
• Measurement of proton electromagnetic form factors in $e^{+}{e}^{-}\to p\bar{p}$ in the energy region 2.00-3.08 GeV
• Polarization Transfer Observables in Elastic Electron Proton Scattering at $Q^2=$2.5, 5.2, 6.8, and 8.5 GeV${}^2$
• Nucleon Electromagnetic Form Factors in the Timelike Region
• Unexpected features of e+e-->ppbar and e+e-->lambda-lambdabar cross sections near threshold
• Measurement of the e+e- --> p anti-p cross section in the energy range from 3.0 to 6.5 GeV
• Study of the process $e^{+}{e}^{-}\to p\bar{p}$ in the c.m. energy range from threshold to 2 GeV with the CMD-3 detector
• Periodic interference structures in the time-like proton form factor
• Nucleon electromagnetic form factors and polarization observables in space-like and time-like regions
• Time-like and space-like electromagnetic form factors of nucleons, a unified description
• Study of the process $e^{+}{e}^{-}\to p\bar{p}$ via initial state radiation at BESIII
• Observation of a Fine Structure in $e^{+}{e}^{-}\to$ hadrons Production at the Nucleon-antinucleon Threshold
• A model for space and time-like proton (neutron) form factors
• Testing axial and electromagnetic nucleon form factors in time-like regions in the processes $\bar{p}+n\to {\pi }^{-}+{\ell }^{-}+{\ell }^{+}$ and $\bar{p}+p\to {\pi }^0+{\ell }^{-}+{\ell }^{+}$, $\ell =e$, $\mu$
• Polarization effects in the reaction $\bar{p}+p\to e^{+}+e^{-}$ in presence of two-photon exchange
• 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 (15)

• Dispersion-theoretical analysis of the electromagnetic form factors of the nucleon: Past, present and future
• Measurement of the Energy-Dependent Electromagnetic Form Factors of a Charmed Baryon
• Timelike nucleon electromagnetic form factors: All about interference of isospin amplitudes
• Proton Electromagnetic Form Factors in the Time-like Region through the Scan Technique
• Electromagnetic form factors of neutron and neutral stange hyperons in the oscillating view of point
• New insights into the oscillation of the nucleon electromagnetic form factors
• Electromagnetic $|G_E/G_M|$ ratios of hyperons at large timelike $q^2$
• $e^{+}{e}^{-}\to {\Lambda }_c^{+}{\bar{\Lambda }}_c^{-}$ cross sections and the ${\Lambda }_c^{+}$ electromagnetic form factors within the extended vector meson dominance model
• Understanding oscillating features of the timelike nucleon electromagnetic form factors within the extending vector meson dominance model
• The cross section of the process $e^{+}{e}^{-}\to p\bar{p}$ in the vicinity of charmonium $\psi (3770)$ including three-gluon and $D$-meson loop contributions
• The cross section of the process $e^{+}{e}^{-}\to \Lambda \bar{\Lambda }$ in the vicinity of charmonium $\psi (3770)$ including three-gluon and $D$-meson loop contributions
• Compared analysis of time-like hyperon form factors
• Contribution of the non-resonant mechanism to the double and single differential distributions over the invariant variables in the reaction $e^{+}+e^{-}\to N+\bar{N}+{\pi }^0$
• Microscopic parametrization of the near threshold oscillations of the nucleon time-like effective electromagnetic form factors
• Accessing baryon-antibaryon generalized distribution amplitudes in $e^{\pm }\gamma \to e^{\pm }B\bar{B}$