Abstract
The total γ ∗γ ∗ cross-section is derived in the Leading Order QCD dipole picture [1] of BFKL dyamics [2], and compared with the one from 2-gluon exchange. The Double Leading Logarithm approximation of the DGLAP cross-section is found to be small in the phase space studied. Cross sections are calculated for realistic data samples at the e + e − collider LEP and a future high energy linear collider. Next to Leading order corrections to the BFKL evolution have been determined phenomelologically, and are found to give very large corrections to the BFKL cross-section, leading to a reduced sensitivity for observing BFKL effects.
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