Improving QCD with fermions: the 2 dimensional case of QCD with Sea   Quarks
  We study QCD in 2 dimensions using the improved lattice fermionic Hamiltonian proposed by Luo, Chen, Xu and Jiang. The vector mass and the chiral condensate are computed for various $SU(N_C)$ gauge groups. We do observe considerable improvement in comparison with the Wilson quark case. 
Xiang-Qian Luo, J. Jiang, S. Guo, J. Li, J. Liu, Z. Mei, H. Jirari, H.   Kroger, C.M. Wu