Higher-Order QCD Corrections in Prompt Photon Production
  We exhibit a method for simultaneously treating recoil and threshold corrections in single-photon inclusive cross sections, working within the formalism of collinear factorization. This approach conserves both the energy and transverse momentum of resummed radiation. At moderate p_T, we find the potential for substantial enhancements from higher-order perturbative and power-law nonperturbative corrections. 
Eric Laenen (NIKHEF), George Sterman, Werner Vogelsang (YITP, SUNY   Stony Brook)