$|V_{us}|$ from $K_{\ell 3}$ decay and four-flavor lattice QCD

A. Bazavov, C. Bernard, C. DeTar +17

Using HISQ $N_f=2+1+1$ MILC ensembles with five different values of the lattice spacing, including four ensembles with physical quark masses, we have performed the most precise com…