Pion and nucleon in two flavour QCD with unimproved Wilson fermions
  We calculate pion mass, pion decay constant, PCAC quark mass and nucleon mass in two flavour lattice QCD with unimproved Wilson fermion and gauge actions. Simulations are performed using DD-HMC algorithm at two lattice spacings and two volumes for several values of the quark mass. The cutoff effects in pion mass and nucleon mass for the explored region of parameter space are found to be negligible. The chiral behaviours of pion mass, pion decay constant and quark condensate are found to be qualitatively consistent with NLO chiral perturbation theory. 
Abhishek Chowdhury, Asit K. De, Sangita De Sarkar, A. Harindranath,   Jyotirmoy Maiti, Santanu Mondal and Anwesa Sarkar
hep-lat hep-ph nucl-th