Measurement of proton electromagnetic form factors in $e^{+}{e}^{-}\to p\bar{p}$ in the energy region 2.00-3.08 GeV

Abstract

The process of $e^{+}{e}^{-}\to p\bar{p}$ is studied at 22 center-of-mass energy points ($\sqrt{s}$) from 2.00 to 3.08 GeV, exploiting 688.5~pb${}^{-1}$ of data collected with the BESIII detector operating at the BEPCII collider. The Born cross section~(${\sigma }_{p\bar{p}}$) of $e^{+}{e}^{-}\to p\bar{p}$ is measured with the energy-scan technique and it is found to be consistent with previously published data, but with much improved accuracy. In addition, the electromagnetic form-factor ratio ($|G_E/G_M|$) and the value of the effective ($|G_{\mathrm{eff}}|$), electric ($|G_E|$) and magnetic ($|G_M|$) form factors are measured by studying the helicity angle of the proton at 16 center-of-mass energy points. $|G_E/G_M|$ and $|G_M|$ are determined with high accuracy, providing uncertainties comparable to data in the space-like region, and $|G_E|$ is measured for the first time. We reach unprecedented accuracy, and precision results in the time-like region provide information to improve our understanding of the proton inner structure and to test theoretical models which depend on non-perturbative Quantum Chromodynamics.

References in corpus (17)

• Design and Construction of the BESIII Detector
• Precision Rosenbluth measurement of the proton elastic form factors
• Study of e+e- --> p anti-p via initial-state radiation at BABAR
• The size of the proton - closing in on the radius puzzle
• Precision Measurements of the Timelike Electromagnetic Form Factors of Pion, Kaon, and Proton
• Measurement of the proton form factor by studying $e^{+}{e}^{-}\to p\bar{p}$
• 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
• Measurement of the cross section for e^+e^- -> ppbar at center-of-mass energies from 2.0 to 3.07 GeV
• A measurement of the CP-conserving component of the decay KS -> pi+ pi- pi0
• Luminosity measurements for the R scan experiment at BESIII
• Study of the process $e^{+}{e}^{-}\to p\bar{p}$ via initial state radiation at BESIII
• Phenomenological analysis of near threshold periodic modulations of the proton timelike form factor
• Tuning and validation of hadronic event generator for $R$ value measurements in the tau-charm region
• Nucleon form factors and final state radiative corrections to $e^{+}{e}^{-}\to \bar{p}p\gamma$
• Measurement of the integrated luminosity and the center-of-mass energy of the data taken by BESIII at $\sqrt{s}=2.125$ GeV

Cited by in corpus (39)

• STCF Conceptual Design Report: Volume 1 -- Physics & Detector
• New Features in the Electromagnetic Structure of the Neutron
• New insights into the nucleon's electromagnetic structure
• Nucleon axial and pseudoscalar form factors from lattice QCD at the physical point
• Measurements of Sigma+ and Sigma- Time-like Electromagnetic Form Factors for center-of-mass energies from 2.3864 to 3.0200 GeV
• Measurement of proton electromagnetic form factors in the time-like region using initial state radiation at BESIII
• Hyperon electromagnetic form factors in the timelike region
• Measurement of the Energy-Dependent Electromagnetic Form Factors of a Charmed Baryon
• Measurement of cross-section for $e^{+}{e}^{-}\to {\Xi }^{-}{\bar{\Xi }}^{+}$ near threshold at BESIII
• Measurement of cross section for $e^{+}{e}^{-}\to {\Xi }^0{\bar{\Xi }}^0$ near threshold
• New fit of time-like proton electromagnetic form factors from $e^{+}{e}^{-}$ colliders
• Probing the internal structure of baryons
• The potential of $\Lambda$ and ${\Xi }^{-}$ studies with PANDA at FAIR
• Timelike nucleon electromagnetic form factors: All about interference of isospin amplitudes
• $N\bar{N}$ production in $e^{+}{e}^{-}$ annihilation near the threshold revisited
• Proton Electromagnetic Form Factors in the Time-like Region through the Scan Technique
• Study of $e^{+}{e}^{-}\to {\Omega }^{-}{\bar{\Omega }}^{+}$ at center-of-mass energies from 3.49 to 3.67 GeV
• Toy model to understand oscillatory behavior in timelike nucleon form factors
• The $\Sigma$ and $\Xi$ electromagnetic form factors in the extended vector meson dominance model
• Electromagnetic form factors of neutron and neutral stange hyperons in the oscillating view of point
• Determination of the ${\Sigma }^{+}$ Timelike Electromagnetic Form Factors
• Production and decay of polarized hyperon-antihyperon pairs
• Understanding oscillating features of the timelike nucleon electromagnetic form factors within the extending vector meson dominance model
• Electromagnetic form factors of ${\Sigma }^{+}$ and ${\Sigma }^{-}$ in the vector meson dominance model
• Natural explanation of recent results on $e^{+}{e}^{-}\to \Lambda \bar{\Lambda }$
• Production of $D^{(\ast )}{\bar{D}}^{(\ast )}$ near the thresholds in $e^{+}{e}^{-}$ annihilation
• Compared analysis of time-like hyperon form factors
• Electromagnetic nucleon form factors in the extended vector meson dominance model
• Search for damped oscillating structures from charged pion electromagnetic form factor data
• Measurements of Born Cross Sections for $e^{+}{e}^{-}\to {\Lambda }_c^{+}{\bar{\Lambda }}_c(2595{)}^{-}+c.c.$ and $e^{+}{e}^{-}\to {\Lambda }_c^{+}{\bar{\Lambda }}_c(2625{)}^{-}+c.c.$ at $\sqrt{s}=$4918.0 and 4950.9 MeV
• Coupled-channel analysis of the near-threshold $e^{+}{e}^{-}\to N\bar{N}$ cross sections
• Microscopic parametrization of the near threshold oscillations of the nucleon time-like effective electromagnetic form factors
• Contribution of the non-resonant mechanism to the double and single differential distributions over the invariant variables in the reaction $e^{+}+e^{-}\to N+\bar{N}+{\pi }^0$
• Unraveling the structure of $\Lambda$ hyperons with polarized $\Lambda \bar{\Lambda }$ pairs
• Analytical formula for the cross section of hadron production from $e^{+}{e}^{-}$ collisions around the narrow charmouinum resonances
• Prediction of neutron electromagnetic form factors behaviors just by the proton electromagnetic form factors data
• Accessing baryon-antibaryon generalized distribution amplitudes in $e^{\pm }\gamma \to e^{\pm }B\bar{B}$
• Baryon Form Factors
• A description of charmonia decays $J/\psi \to B\bar{B}$ within the QCD factorisation framework