出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：The calculation of the long-distance contribution to the K0−K0 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, DS = 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 KL-KS mass difference and the long-distance contributions to eK.
