One-loop radiative corrections to the helicity amplitudes of QCD   processes involving four quarks and one gluon
  We present analytic results for the one-loop corrections of the helicity amplitudes of the QCD five-parton subprocesses involving four quarks and one gluon obtained with a standard Feynman diagram calculation using dimensional reduction. 
Zoltan Kunszt, Adrian Signer and Zoltan Trocsanyi