Radiative effects in the production and leptonic decay of psi-mesons of psi-meson

A new GITAsub(e)GITAsub(l)/GITA expression is obtained for a psi-resonance in the E+e-→psi→l+l- reaction (GITAsub(e) and GITAsub(l) denote psi→e+e- and psi→l+l- decay widths, respectively, GITA-ful psi-resonance width), which takes into account radiative corrections. The corrections include hard photon emission by leptons and finite energy resolution. Total probability of the psi→l+l-γ radiative leptonic decay is derived. Numerical analysis of experimental data available for the e+e-→psi(3,1)→e+e- reaction is conducted. For psi (3,1) resonance the GITAsub(2)2/GITA, GITAsub(e) and GITA parameters are determined