Light hadrons from Nf=2+1+1 dynamical twisted mass fermions
  We present results of lattice QCD simulations with mass-degenerate up and down and mass-split strange and charm (Nf=2+1+1) dynamical quarks using Wilson twisted mass fermions at maximal twist. The tuning of the strange and charm quark masses is performed at three values of the lattice spacing a~0.06 fm, a~0.08 fm and a~0.09 fm with lattice sizes ranging from L~1.9 fm to L~3.9 fm. We perform a preliminary study of SU(2) chiral perturbation theory by combining our lattice data from these three values of the lattice spacing. 
R. Baron, B. Blossier, P. Boucaud, J. Carbonell, A. Deuzeman, V.   Drach, F. Farchioni, V. Gimenez, G. Herdoiza, K. Jansen, ...
hep-lat