Probing the QCD Pomeron in e+e- Collisions *

Probing the Qcd Pomeron in E + E Collisions Typeset Using Revt E X

The total cross section for scattering virtual photons at high energy is sensitive to pomeron physics. If the photons are su ciently virtual, QCD perturbation theory applies, so that the reaction probes the short distance pomeron. We study this reaction for present and future e e colliders. Typeset using REVTEX

Probing the QCD pomeron in doubly tagged e+e− collisions

We calculate the total cross-section for γγ collisions and for the process e+e− → e+e−+hadrons with two tagged leptons assuming dominance of the QCD pomeron exchange. We solve the BFKL equation including the dominant subleading effects generated by the consistency constraint which restricts the available phase-space of the emitted gluons to the region in which the virtuality of the exchanged gl...

Probing the QCD pomeron in high-energy γ ∗ γ ∗ collisions a

QCD at Photon Colliders ∗

The novel possibilities of probing the photon structure and high energy limit of QCD at photon colliders are summarised. We discuss the photon structure function F γ 2 (x, Q 2), the gluon distribution in the photon and the spin dependent structure function g γ 1 (x, Q 2) of the photon and emphasise advantages of the pho-ton colliders for measuring these quantities. The possibility of probing th...

The QCD pomeron in e+e− collisions

The contribution of the QCD pomeron to the processes: e+e− → e+e−J/ψJ/ψ and e+e− → e+e− hadrons (with tagged electrons) is discussed. We focus on reactions which occur via photon-photon collisions, with virtual photons coming from the Weizsäcker-Wiliams spectrum of the electrons. We stress the importance of the non-leading corrections to the BFKL equation and take into account dominant non-lead...