Nuclear dependence asymmetries in direct photon production
  We study the nuclear dependences of high-$p_T$ jet cross sections in one photon and one jet production in proton-nucleus collisions. We find that there exist asymmetries between the outgoing jets and photons. A convincing reason responsible for those asymmetries are demonstrated in perturbative QCD. Significant nuclear enhancements are also found in the inclusive jet cross sections. 
Hong Shen (U. of Nankai), Ma Luo (U. of Nankai)