Infrared behavior of one-loop QCD amplitudes at next-to-next-to-leading order

We present universal factorization formulas describing the behavior of one-loop QCD amplitudes as external momenta become either soft or collinear. Our results are valid to all orders in the dimensional regularization parameter, {epsilon}. Terms through O({epsilon}{sup 2}) can contribute in infrared divergent phase space integrals associated with next-to-next-to-leading order jet cross sections. (c) 1999 The American Physical Society.