One-Loop Amplitudes for e+ e- to q-bar q Q-bar Q
Z. Bern, L. Dixon, D. A. Kosower, S. Weinzierl
Abstract
We present the one-loop helicity amplitudes for processes involving a vector boson V (V=W,Z, or gamma*) and four massless quarks, 0 to V q-bar q Q-bar Q, where V couples to a massless lepton pair. These amplitudes are required for next-to-leading order O(alphas3) numerical programs for four-jet production at e+ e- colliders, for W, Z or Drell-Yan production in association with two jets at hadron colliders, and for three-jet production in deeply inelastic scattering experiments. We obtained the amplitudes presented here by using their analytic properties to constrain their form.
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