We compute two infinite series of tree-level amplitudes with a massive-scalar pair and an arbitrary number of gluons. We provide results for amplitudes where all gluons have identical helicity, and amplitudes with one gluon of opposite helicity. These amplitudes are useful for unitarity-based one-loop calculations in nonsupersymmetric gauge theories generally, and QCD, in particular.

• Received 3 September 2005

DOI:https://doi.org/10.1103/PhysRevD.73.065007