Tensor Form Factors for B → K Decays from the Lattice

摘要

A calculation of the tensor form factor (f(T)) for rare decays of the B-meson to the K-meson is presented. In order to study the heavy quark mass dependence, we also give f(T) for D-meson decays. For decays of B and D to the K-meson, we calculate the vector form factors (f(+) and f(0)). The lattice results are obtained from a quenched 40(3) x 80 lattice with an inverse lattice spacing of a(-1) similar or equal to 4.97 GeV using the Wilson gauge action and the O(a) improved Wilson action for quarks.