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On the electromagnetic form factors of hadrons in the time-like region near threshold
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abstract
Hadron electromagnetic form factor in the time-like region at the boundary of the physical region is considered. The energy behavior of the form factor is shown to be determined by the strong hadron-antihadron interaction. Imaginary parts of the scattering lengths for $p\bar{p}$, $\Lambda\bar{\Lambda}$, $\Lambda\bar{\Sigma}^0 (\bar{\Lambda}{\Sigma}^0)$ and ${\Sigma}^0\bar{\Sigma}^0$ are estimated. Developed approach enables us to estimate imaginary part of the scattering volume from $D^*\bar{D^*}$ experimental data. The form factor energy behavior away from the threshold is obtained within a semiphenomenological model of hadron-antihadron interaction.
Forward citations
Cited by 3 Pith papers
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Hyperon electromagnetic timelike elastic form factors at large $q^2$
Using a quark model calibrated in the spacelike region plus analyticity relations, the paper predicts timelike hyperon form factors that agree broadly with available data, with clear exceptions for Lambda and Xi-zero,...
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Observation of quantum entanglement in $\Lambda \bar{\Lambda}$ pair production via electron-positron annihilation
A derived angular observable O1 that is a rescaling of the published BESIII alpha_psi value is presented as a 124.9-sigma observation of hyperon entanglement, without any new measurement.
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Electromagnetic form factors of hyperons in the timelike region: A short review
A review of recent experimental and theoretical results on hyperon electromagnetic form factors in the timelike region, highlighting near-threshold final-state interactions.
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