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arXiv · hep-ph/9712312

Event Orientation in e+e- Annihilation

P. N. Burrows·P. Osland
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Abstract

We review the orientation of e+e- \to q\bar q g events in terms of the polar and azimuthal angles of the event plane w.r.t. the electron beam direction. The asymmetry of the azimuthal-angle distribution is, like the left-right forward-backward polar-angle asymmetry, sensitive to parity-violating effects in three-jet events; these are presently being explored experimentally. We present these observables at O(α_s) in perturbative QCD and discuss their dependence on longitudinal beam polarisation and c.m. energy. A moments analysis in terms of the orientation angles allows a more detailed test of QCD by isolating the independent helicity cross-sections.

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P. N. Burrows, P. Osland. 1997-12-09. Event Orientation in e+e- Annihilation. https://arxiv.org/abs/hep-ph/9712312

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