Vector to pseudoscalar meson radiative transitions in chiral theory with resonances

TL;DR

This paper models vector to pseudoscalar meson radiative transitions using chiral effective field theory with resonances, fitting parameters to recent experimental data and comparing predictions with other models.

Contribution

It introduces a chiral theory approach with resonances to describe meson transition form factors, fitting to recent experimental data.

Findings

Successfully fitted omega -> pi gamma* transition form factor to NA 60 data.

Compared model predictions with experimental data and other theoretical models.

Provided insights into meson transition dynamics within chiral effective theory.

Abstract

The form factor of the vector meson V conversion transition into the pseudoscalar meson P and the lepton pair l+l- is presented for V=rho0,omega,phi and P=pi0,eta. Our approach is based on the chiral effective field theory with resonances. The normalized form factor for omega -> pi gamma* transition was fitted to the recent NA 60 data by varying the only free parameter sigma_V. The results are compared to the available data and to the predictions of other models.