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

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

2000-05-19

arxiv.org/abs/hep-ph/0005201v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

5 pages Latex + 2 Figures EPS

Scientific paper

Based on the color dipole representation, we investigate consequences for the $\gamma^{*}\gamma^{*},\gamma^{*}\gamma$ 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 $\sigma^{\gamma^*\gamma^*}(W,Q^2,P^2)$ and the recent data taken by the L3 Collaboration.

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