Maximal twist and the spectrum of quenched twisted mass lattice QCD
  Results on the hadron masses for a degenerate doublet of up and down quarks from quenched twisted mass lattice QCD at maximal twist are presented. Two definitions of maximal twist are used and the hadron masses for these definitions are compared. Mass splittings within the Delta(1232) multiplet due to flavor breaking effects are discussed. 
Abdou M. Abdel-Rehim, Randy Lewis, R. M. Woloshyn