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arXiv · hep-ph/9305296

QED-Induced Rapidity-Gap Events at the Z Peak

Hung Jung Lu·Stanley J. Brodsky·Valery A. Khoze
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Abstract

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 $1+\cos^2θ$ distribution in the jet-pair scattering angle, instead of the $\sin^2θ$ distribution of the QCD case.

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Hung Jung Lu, Stanley J. Brodsky, Valery A. Khoze. 1993-05-21. QED-Induced Rapidity-Gap Events at the Z Peak. https://doi.org/10.1016/0370-2693(93)90513-h

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