QED correction to asymmetry for polarized ep–scattering from the method of the electron structure functions

The electron structure function method is applied to calculate model–independent radiative corrections to an asymmetry of electron–proton scattering. The representations for both spin–independent and spin–dependent parts of the cross–section are derived. Master formulae take into account the leading corrections in all orders and the main contribution of the second order next–to–leading ones and have accuracy at the level of one per mille. Numerical calculations illustrate our analytical results for both elastic and deep inelastic events.