Event Orientation in e+e- Annihilation
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(\alpha_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.
Cite
@article{arxiv.hep-ph/9712312,
title = {Event Orientation in e+e- Annihilation},
author = {P. N. Burrows and P. Osland},
journal= {arXiv preprint arXiv:hep-ph/9712312},
year = {2007}
}
Comments
8 pages, LaTeX, 4 figures, uses epsf, to appear in the Proceedings of the XIIth International Workshop on High Energy Physics and Quantum Field Theory, 4-10 September 1997, Samara, Russia