With efficient simulation techniques, improved actions and increased computing power lattice QCD calculations are possible at
small quark masses, yet simulations near the physical parameters still pose a challanging problem. We recently proposed a new method to
overcome some of the problems.
Our approach is to simulate at a heavier quark mass and reweight to
the target light quark mass value, calculating the weight factors stochastically. In this talk I will briefly describe the method to calculate the weight factors, and show that reweighting is an efficient technique even on large volumes, allowing us to approach the physical limit. I will discuss physical results we obtained both in the small volume epsilon and large volume pregimes, using Wilsonclover fermions.
