Nucleon electromagnetic form factors and polarization observables in space-like and time-like regions

Abstract

We perform a global analysis of the experimental data of the electromagnetic nucleon form factors, in space-like and time-like regions. We give the expressions of the observables in annihilation processes, such as $p+\bar{p}\to {\ell }^{+}+{\ell }^{-}$, $\ell =e$ or $\mu$, in terms of form factors. We discuss some of the phenomenological models proposed in the literature for the space-like region, and consider their analytical continuation to the time-like region. After determining the parameters through a fit on the available data, we give predictions for the observables which will be experimentally accessible with large statistics, polarized annihilation reactions.

25 pages, 5 figures 7 tables

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Cited by in corpus (43)

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• Proton-antiproton annihilation into massive leptons
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• The electromagnetic form factors of ${\Lambda }_c$ hyperon in the vector meson dominance model
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• Annihilation of $\bar{p}+p\to e^{+}+e^{-}+{\pi }^0$ and $\bar{p}+p\to \gamma +{\pi }^0$ through $\omega$-meson intermediate state
• Comments on ISR method in modern experiment and influence of final state radiation
• Radiative proton-antiproton annihilation to a lepton pair
• Analytic continuation of nucleon electromagnetic form factors in the time-like region
• Analysis of polarization observables and radiative effects for the reaction $\bar{p}+p\to e^{+}+e^{-}$
• Extraction of proton form factors in the timelike region from single-polarized e+ e- -> \vec p anti-p events
• Pseudoscalar current and covariance with the light-front approach
• Soft rescattering in the timelike proton form factor within a spacetime scheme
• General analysis and numerical estimations of polarization observables in $\bar{N}+N\to \pi +e^{+}+e^{-}$ reaction in an exclusive experimental setup
• Logarithmic corrections and soft photon phenomenology in the multipole model of the nucleon form factors
• Flavor content of nucleon form factors in the space- and time-like region
• Observation of $\Xi (1530{)}^0$ Polarization and Determination of Its Electric and Magnetic Moments in $\psi (3686)\to \Xi (1530{)}^0\bar{\Xi }(1530{)}^0$