Measurement of the γ^*γ^*→ η^' transition form factor and of the e⁺e⁻→ π⁺π⁻π⁰π⁰π⁰ and π⁺π⁻π⁰π⁰η cross sections by BABAR

Department of Physics and Astronomy, University of California, Riverside, CA 92521, USA

^* e-mail: bill.gary@ucr.edu

Published online: 19 April 2019

Abstract

Two recent studies from the BABAR experiment at SLAC on low-energy hadronic final states in e⁺e⁻ annihilations are presented. The first study provides the first-ever measurement of the γ^*γ^*→ η^' transition factor, where γ^* denotes an off-shell photon. The second study provides the first-ever measurements of the e⁺e⁻→ π⁺ π⁻π⁰π⁰π⁰ and π⁺π⁻π⁰π⁰η cross sections, including studies of the intermediate resonance states and the corresponding J/ψ and ψ(2S) branching fractions.