Quark masses using twisted mass fermion gauge ensembles

Understand

We present a calculation of the up, down, strange and charm quark masses performed within the lattice QCD framework.

• We use the twisted mass fermion action and carry out simulations that include in the sea two light mass-degenerate quarks, as well as the strange and charm quarks.
• In the analysis we use gauge ensembles simulated at three values of the lattice spacing and with light quarks that correspond to pion masses in the range from 350 MeV to the physical value, while the strange and charm quark masses are tuned approximately to their physical values.
• We use several quantities to set the scale in order to check for finite lattice spacing effects and in the continuum limit we get compatible results.