QED-Induced Rapidity-Gap Events at the Z Peak

Details QED-Induced Rapidity-Gap Events at the Z Peak QED-Induced Rapidity-Gap Events at the Z Peak

1993-05-21

arxiv.org/abs/hep-ph/9305296v1

Phys.Lett.B312:215-219,1993

Physics

High Energy Physics

High Energy Physics - Phenomenology

13 pages, plain TeX (needs the PHYZZX macros), 4 figures in PostScript. SLAC-PUB-6116, DOE/ER/40762-009, U of Md. PP \#93-198

Scientific paper

10.1016/0370-2693(93)90513-H

We study rapidity-gap events in $e^+e^-$ annihilation at the Z boson peak initiated by the emission of a virtual photon. This mechanism is suppressed by the QED coupling constant, but it is enhanced due to a large propagator term from the virtual photon. For typical kinematics, we find a smaller event rate than analogous QCD type gap events. In the small jet-pair invariant mass limit, the QED type events follow a $1+\cos^2\theta$ distribution in the jet-pair scattering angle, instead of the $\sin^2\theta$ distribution of the QCD case.

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