Speaker
Description
We revisit the derivation of collinear factorization for Deep Inelastic Scattering to more faithfully represent the partonic kinematic at sub-asymptotic energy than possible in the conventional approach. We verify the validity of the obtained factorization formula by considering a diquark spectator model designed to reproduce the main features of electron-proton scattering at large $x_B$ in Quantum Chromo-Dynamics, by comparing analytical calculations of the full process and factorized cross sections. We propose a new scaling variables that maximizes the kinematic range of validity of collinear factorization, and highlight the intrinsic limitations of collinear factorization due to the inevitably approximate treatment of four momentum conservation in factorized diagrams.
