Orateur
Fatemeh NOURI
(IJCLab)
Description
We implement a recently proposed parametrization of the pion vector form factor and apply it to $\tau^-\to\pi^-\pi^0\nu_\tau$ data. Constrained by analyticity and unitarity, this parametrization provides access to both the physical and second Riemann sheets, allowing us to extract the $\rho$ resonance pole parameters and low-energy $\pi\pi$ scattering parameters without external scattering input. We discuss the results, their dependence on the expansion order, and the consistency between experimental datasets.
Auteur
Fatemeh NOURI
(IJCLab)