Dimension-six matrix elements for meson mixing and lifetimes from sum rules
Dimension-six matrix elements for meson mixing and lifetimes from sum rules
The hadronic matrix elements of dimension-six $\Delta F=0,2$ operators are crucial inputs for the theory predictions of mixing observables and lifetime ratios in the $B$ and $D$ system. We determine them using HQET sum rules for three-point correlators. The results of the required three-loop computation of the correlators and the …