$\eta$ and ${\eta }^{\prime }$ transition form factors from Padé approximants

Abstract

We employ a systematic and model-independent method to extract, from space- and time-like data, the $\eta$ and ${\eta }^{\prime }$ transition form factors (TFFs) obtaining the most precise determination for their low-energy parameters and discuss the ${\Gamma }_{\eta \to \gamma \gamma }$ impact on them. Using TFF data alone, we also extract the $\eta -{\eta }^{\prime }$ mixing parameters, which are compatible to those obtained from more sophisticated and input-demanding procedures.

4 pages, 2 figures, presented at the 13th International Workshop on Meson Production, Properties and Interaction (MESON 2014); added references

References in corpus (1)

• Vector Meson Dominance as a first step in a systematic approximation: the pion vector form factor

Cited by in corpus (1)

• The ${\eta }^{\prime }$ transition form factor from space- and time-like experimental data