Quark-Antiquark Exchange in $γ^* γ^*$ Scattering

Details Quark-Antiquark Exchange in $γ^* γ^*$ Scattering Quark-Antiquark Exchange in $γ^* γ^*$ Scattering

2003-08-18

arxiv.org/abs/hep-ph/0308181v2

JHEP 0309:076,2003

Physics

High Energy Physics

High Energy Physics - Phenomenology

32 pages, 11 figures, JHEP style

Scientific paper

10.1088/1126-6708/2003/09/076

We calculate the high energy behavior of quark-antiquark exchange in $\gamma^* \gamma^*$ elastic scattering by summing, to all orders, the leading double logarithmic contributions of the QCD ladder diagrams. Motivation comes from the LEP data for $\sigma_{tot}^{\gamma^* \gamma^*}$ which indicate the need for secondary reggeon exchange. We show that, for large photon virtualities, this exchange is calculable in pQCD. This applies, in particular, to parts of the LEP kinematic region.

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