Vector to pseudoscalar meson radiative transitions in chiral theory with resonances

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.

Comments: 4 pages, 2 figures, based on the talk given at the 3rd International Conference "Quantum Electrodynamics and Statistical Physics" (QEDSP2011), 29.08-02.092011, Kharkov, Ukraine; http://vant.kipt.kharkov.ua/ARTICLE/VANT_2012_1/article_2012_1_179.pdf