Speaker
Norman Christ
(Columbia University)
Description
The calculation of the long-distance contribution to the
K^0-\overline{K}_0 mass matrix is divided into three parts:
First, the calculation of the matrix element between kaon
states of the product of two space-time integrated,
$\Delta S=1$, four-quark weak operators. Second an RI/MOM
subtraction to remove the short distance part of this matrix
element in a fashion consistent with the calculation of the
physical short distance part. Third an application of the
Lellouch-Luscher method, generalized to second order in the
weak interactions, to control finite volume errors. Such
an approach promises to permit accurate lattice calculation
of the $K_L$-$K_S$ mass difference and the long-distance
contributions to $\epsilon_K$.
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Primary author
Norman Christ
(Columbia University)
