Kinematic reconstruction of deep inelastic scattering at HERA: the (Sigma)method

摘要

We review and compare the reconstruction methods of the inclusive deep inelastic scattering variables used at HERA. We introduce a new prescription, the Sigma ((Sigma)) method, which allows to measure the structure function of the proton F(sub 2)(x, Q(sup 2)) in a large kinematic domain, and in particular in the low x-low Q(sup 2) region, with small systematic errors and small radiative corrections. A detailed comparison between the (Sigma) method and the other methods is shown. Extensions of the (Sigma) method are presented. The effect of QED radiation on the kinematic reconstruction and on the structure function measurement is discussed. (orig.) (ERA citation 20:014279)