出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：The largest contribution to the CP violating KL −KS mixing parameter eK comes from second order weak interactions at short distances and can be accurately determined by a combination of electroweak perturbation theory and the calculation of the parameter BK from lattice QCD. However, there is an additional long distance contribution to eK which is estimated to be of order 5%. Here recently introduced lattice techniques for computing the long-distance component of the KL−KS mass difference are generalized to this long-distance contribution to eK.
