Measuring the hadronic cross section via radiative return

TL;DR

This paper reviews recent experimental progress in measuring hadronic cross sections at fixed-energy particle colliders using radiative return, highlighting preliminary results from KLOE and BABAR collaborations.

Contribution

It provides an overview of experimental advancements and initial measurements in hadronic cross section determination via radiative return at particle factories.

Findings

Preliminary results for e+e- -> ρ γ -> π+π-γ from KLOE.

Initial measurements from BABAR collaboration.

Fit to the pion form factor using radiative return data.

Abstract

Recently it has been demonstrated that particle factories, such as DAPHNE and PEP-II, operating at fixed center-of-mass energies, are able to measure hadronic cross sections as a function of the hadronic system energy using the raditive return. This paper is an experimental overview of the progress in this aera. Preliminary results from KLOE for the process e+e- -> \rho \gamma -> \pi+\pi-\gamma and a fit to the pion form factor are presented. Some first results from the BABAR collaboration are also shown.