A combined analysis of the space- and time-like experimental data for the η transition form factor is performed in a model-independent way by means of rational approximants. The recent measurement of the e+ e- invariant mass spectrum of the η → e+ e- γ decay provided by the A2 Collaboration allowed us to extract the most precise and up-to-date slope and curvature parameters of the form factor. The impact of this new analysis on the η-η' mixing parameters and the VPγ couplings is also discussed.
|Journal||Journal of University of Science and Technology of China|
|Publication status||Published - 1 Jun 2016|
- Rational approximants
- Slope and curvature parameters;η-ηmixing
- Space- and time-like data analysis
- V→Pγradiative decays
- ηtransition form factor