2020 Impact factor 4.590
Particles and Fields
Eur. Phys. J. C 9, 69-79
DOI 10.1007/s100529900022

Deep inelastic scattering with a tagged photon:
QED corrections for the $\Sigma$ method

H. Anlauf

Fachbereich Physik, Siegen University, D-57068 Siegen, Germany

Received: 12 January 1999 / Published online: 22 March 1999

After a brief review of the kinematics of deep inelastic scattering (DIS) within the so-called $\Sigma$ method, we derive the necessary formulae for the treatment of QED radiative corrections to DIS originating from hard photon radiation. The results are applied to a calculation of the corrections to DIS with a tagged photon with next-to-leading logarithmic accuracy under HERA conditions. It turns out that the next-to-leading logarithmic corrections are quite important for the $\Sigma$ method. We also discuss the dependence of the corrections on the longitudinal structure function of the proton, FL, in the region of low Q2 and moderate x.

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