Pseudoscalar decay constants $f_K/f_{\pi }$, $f_D$ and $f_{D_s}$ with $N_f=2+1+1$ ETMC configurations

P. Dimopoulos, R. Frezzotti, P. Lami +7

We present a lattice QCD calculation of the pseudoscalar decay constants $f_K$, $f_D$ and $f_{D_s}$ performed by the European Twisted Mass Collaboration with $N_f=2+1+1$ dyna…