What can we learn about light-meson interactions at electron-positron colliders?

Abstract

Precision studies at electron-positron colliders with center-of-mass energies in the charm-tau region and below have strongly contributed to our understanding of light-meson interactions at low energies. We focus on the processes involving two or three light mesons with invariant masses below nucleon-antinucleon threshold. A prominent role is given to the interactions of the nine lightest pseudoscalar mesons (pions, kaons, $\eta$, and ${\eta }^{\prime }$) and the two narrow neutral isoscalar vector mesons $\omega$ and $\varphi$. Experimental methods used to produce the mesons are reviewed as well as theory tools to extract properties of the meson-meson interactions. Examples of recent results from the DA$\Phi$NE, BEPCII, and VEPP-2000 colliders are presented. In the outlook we briefly discuss prospects for further studies at future super-charm-tau factories.

arXiv comment132 pages, 74 figures (v2: typos corrected, references updated, corresponds to the published version)

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• A Comprehensive Study of the Radiative Decays of $J/\psi$ and $\psi (2S)$ to Pseudoscalar Meson Pairs, and Search for Glueballs
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• The Physics of DAFNE and KLOE
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• A Non-parametric Approach to the D+ to K*0bar mu+ nu Form Factors
• Patterns of CP violation from mirror symmetry breaking in the $\eta \to {\pi }^{+}{\pi }^{-}{\pi }^0$ Dalitz plot
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• The Present Status on sigma and kappa Meson Properties
• ${\eta }^{\prime }\to \eta \pi \pi$ decays in unitarized resonance chiral theory
• Inclusive Radiative $J/\psi$ Decays
• Final state interactions in the decays J/psi->VPP
• Two-Meson Form Factors in Unitarized Chiral Perturbation Theory
• Physics Accomplishments and Future Prospects of the BES Experiments at the BEPC Collider
• Dispersive construction of two-loop $P\to \pi \pi \pi$ $(P=K,\eta )$ amplitudes
• Implications of unitarity and analyticity for the Dπform factors
• Measurement of the phase between strong and electromagnetic amplitudes of $J/\psi$ decays
• Isoscalar and isovector kaon form factors from $e^{+}{e}^{-}$ and $\tau$ data
• A practical guide to unravel time-like transition form factors
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