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Probing the QCD pomeron in high-energy $γ^*γ^*$ collisions

V. R. Zoller
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Abstract

Based on the color dipole representation, we investigate consequences for the $γ^{*}γ^{*},γ^{*}γ$ scattering of the finding by Fadin, Kuraev and Lipatov that incorporation of asymptotic freedom into the BFKL equation makes the QCD pomeron a series of isolated poles in the angular momentum plane. We present parameter-free predictions for the vacuum exchange contribution to the photon structure function which agree well with OPAL and L3 determinations. A good agreement is found between our predictions for the energy and photon virtuality dependence of the photon-photon cross section $σ^{γ^*γ^*}(W,Q^2,P^2)$ and the recent data taken by the L3 Collaboration.

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V. R. Zoller. 2000-05-19. Probing the QCD pomeron in high-energy $γ^*γ^*$ collisions. https://arxiv.org/abs/hep-ph/0005201

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