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Annihilation Events in the Continuum

The description of $\mathrm{e}^+\mathrm{e}^-$ annihilation into hadronic events involves a number of components: the $s$ dependence of the total cross section and flavour composition, multiparton matrix elements, angular orientation of events, initial-state photon bremsstrahlung and effects of initial-state electron polarization. Many of the published formulae have been derived for the case of massless outgoing quarks. For each of the components described in the following, we will begin by discussing the massless case, and then comment on what is done to accommodate massive quarks.


Stephen Mrenna 2007-10-30