$B^0-{\bar{B}}^0$ Mixing at Next-to-Leading Order

Andrey G. Grozin, Rebecca Klein, Thomas Mannel +1

We compute the perturbative corrections to the HQET sum rules for the matrix element of the ΔB=2 operator that determines the mass shift of $B^0$, ${\bar{B}}^0$ states. Technically,…