Efficient analytic computation of higher-order QCD amplitudes

Z. Bern , G. Chalmers , L.J. Dixon , D.C. Dunbar , David A Kosower (1)

1 SPhT - Service de Physique Théorique

We review techniques simplifying the analytic calculation of one-loop QCD amplitudes with many external legs, for use in next-to-leading-order corrections to multi-jet processes. Particularly useful are the constraints imposed by perturbative unitarity, collinear singularities and a supersymmetry-inspired organization of helicity amplitudes. Certain sequences of one-loop helicity amplitudes with an arbitrary number of external gluons have been obtained using these constraints.

Domaines: Physique Générale [physics.gen-ph]

Z. Bern, G. Chalmers, L.J. Dixon, D.C. Dunbar, David A Kosower. Efficient analytic computation of higher-order QCD amplitudes. Beyond the Standard Model IV, Dec 1994, Lake Tahoe, CA, United States. ⟨hal-00172408⟩