Complete lowest order radiative corrections to five-fold differential cross section of hadron leptoproduction

The contribution of exclusive radiative tail to the cross section of semi-inclusive deep inelastic scattering has been calculated for the first time. Although the experience of inclusive data analyses suggests us that the contribution of radiative tail from the elastic peak is of particular importance, similar effects in the semi-inclusive process were ignored before. The explicit expression for the lowest order modelindependent contribution of exclusive radiative tail to the five-fold differential cross section is obtained and discussed. Numerical estimates provided within Jefferson Lab kinematic conditions demonstrate rather large effects of the exclusive radiative tail in the region at semi-inclusive threshold and for high energy of detected hadron.