出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：We apply nite-size recursion techniques based on the Schrödinger functional formalism to determine
the renormalization group running of four-fermion operators which appear in the DS = 2
effective weak Hamiltonian of the Standard Model. Our calculations are done using O(a) improvedWilson
fermions with Nf = 2 dynamical avours. Preliminary results are presented for the
four-fermion operator which determines the BK-parameter in tmQCD.
