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Kinematic cuts are applied to configurations with massless particlesmassless particle configurations where some cutoff is required to avoid an infinite cross section. In the WHIZARD event generation stage we set the masses of all first and second generation fermions to zero, so that photons, gluons, neutrinos, electrons, muons and u,d,s,c quarks are subject to kinematic cuts. The cuts are specified with given by the WHIZARD input parameters default_jet_cut, default_mass_cut and default_q_cut . We use the WHIZARD default value
default_jet_cut=10 GeV for the minimum invariant mass of a pair of colored particles. We use default_mass_cut=4 GeV for the minimum invariant mass of a pair of colorless particles, and we use default_q_cut=4 GeV for the minimum sqrt(-Q**2) for
massless t-channel processes.
The massless assumption for the first and second fermion generations can produce some odd results given the kinematic cut values we have chosen. For example, the cross section for gamma gamma > tau^^ tau^^
Requests for additional Ecm=500 GeV Samples
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