$γ^*γ^*$ total cross-section in the dipole picture of BFKL dynamics

Details $γ^*γ^*$ total cross-section in the dipole picture of BFKL dynamics $γ^*γ^*$ total cross-section in the dipole picture of BFKL dynamics

1998-12-30

arxiv.org/abs/hep-ph/9812523v1

Nucl.Phys. B555 (1999) 540-564

Physics

High Energy Physics

High Energy Physics - Phenomenology

24 pages, 4 figures

Scientific paper

10.1016/S0550-3213(99)00345-4

The total $\gamma^*\gamma^*$ cross-section is derived in the Leading Order QCD dipole picture of BFKL dynamics, 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 phenomenologically, and are found to give very large corrections to the BFKL cross-section, leading to a reduced sensitivity for observing BFKL.

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