Scaling and chiral extrapolation of pion mass and decay constant with   maximally twisted mass QCD
  We present an update of the results for pion mass and pion decay constant as obtained by the ETM collaboration in large scale simulations with maximally twisted mass fermions and two mass degenerate flavours of light quarks. We discuss the continuum, chiral and infinite volume extrapolation of these quantities as well as the extraction of low energy constants, and investigate possible systematic uncertainties. 
P. Dimopoulos, R. Frezzotti, G. Herdoiza, K. Jansen, C. Michael, C.   Urbach (for the ETM collaboration)