Quark-antiquark contribution to the multigluon amplitudes in the helicity formalism
Vittorio Del Duca
Abstract
Using the helicity formalism, we compute the contribution of a quark-antiquark pair to the tree-level multigluon amplitudes in the high-energy limit. The q\, q-pair production is absent in the leading-log formalism, but contributes to the next-to-leading corrections to it, and is therefore relevant for the computation of parton-parton scattering in the high-energy limit and of the gluon anomalous dimension at small xbj, at next-to-leading accuracy.
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