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We present a high precision lattice calculation of the average up/down,strange and charm quark masses performed with Nf=2 twisted mass Wilsonfermions. The analysis includes data at four values of the lattice spacing andpion masses as low as ~270 MeV, allowing for accurate continuum limit andchiral extrapolation. The strange and charm masses are extracted by usingseveral methods, based on different observables: the kaon and the eta_s mesonfor the strange quark and the D, D_s and eta_c mesons for the charm. The quarkmass renormalization is carried out non-perturbatively using the RI-MOM method.The results for the quark masses in the MSbar scheme read: m_ud(2 GeV)= 3.6(2)MeV, m_s(2 GeV)=95(6) MeV and m_c(m_c)=1.28(4) GeV. We also obtain the ratiosm_s/m_ud=27.3(9) and m_c/m_s=12.0(3).

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