Pion form factors in the intermediate-energy regime are computed via double-dilaton HQCD, indicating non-perturbative strong-interaction effects remain relevant at scales traditionally viewed as perturbative.
A data-driven approach to $\pi^{0}, \eta$ and $\eta^{\prime}$ single and double Dalitz decays
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abstract
The dilepton invariant mass spectra and integrated branching ratios of the single and double Dalitz decays $\mathcal{P}\to\ell^{+}\ell^{-}\gamma$ and $\mathcal{P}\to\ell^{+}\ell^{-}\ell^{+}\ell^{-}$ ($\mathcal{P}=\pi^{0}, \eta, \eta^{\prime}$; $\ell=e$ or $\mu$) are predicted by means of a data-driven approach based on the use of rational approximants applied to $\pi^{0}, \eta$ and $\eta^{\prime}$ transition form factor experimental data in the space-like region.
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Neutral and charged pion Form Factors in the intermediate-energy region from double-dilaton HQCD model
Pion form factors in the intermediate-energy regime are computed via double-dilaton HQCD, indicating non-perturbative strong-interaction effects remain relevant at scales traditionally viewed as perturbative.