Average up/down, strange, and charm quark masses with Nf=2 twisted-mass lattice QCD

We present a high precision lattice calculation of the average up/down, strange, and charm quark masses performed with N(f) = 2 twisted-mass Wilson fermions. The analysis includes data at four values of the lattice spacing and pion masses as low as similar or equal to 270 MeV, allowing for accurate continuum limit and chiral extrapolation. The strange and charm masses are extracted by using several methods, based on different observables: the kaon and the eta(s) meson for the strange quark and the D, D(s), and eta(c) mesons for the charm. The quark mass renormalization is carried out nonperturbatively using the regularization independent momentum-subtraction renormalization (RI-MOM) method. The results for the quark masses in the modified minimal subtraction ((MS) over bar) scheme read: (m) over bar (ud)(2 GeV) = 3: 6(2) MeV, (m) over bar (s)(2 GeV) = 95(6) MeV, and (m) over bar (c)((m) over bar (c)) = 1.28(4) GeV. We also obtain the ratios m(s)/m(ud) 27.3(9) and m(c)/m(s) = 12.0(3).