Non-perturbative scale evolution of four-fermion operators in two-flavour QCD

We apply finite-size recursion techniques based on the Schrodinger functional formalism to determine the renormalization group running of four-fermion operators which appear in the Delta S=2 effective weak Hamiltonian of the Standard Model. Our calculations are done using O(a) improved Wilson fermio...

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Detalles Bibliográficos
Autores principales: Dimopoulos, Petros, Herdoiza, Gregorio, Vladikas, Anastassios, Palombi, Filippo, Pena, Carlos, Sint, Stefan
Lenguaje:eng
Publicado: 2006
Materias:
Particle Physics - Lattice
Acceso en línea:https://dx.doi.org/10.22323/1.032.0158
http://cds.cern.ch/record/992761
Descripción
Sumario:We apply finite-size recursion techniques based on the Schrodinger functional formalism to determine the renormalization group running of four-fermion operators which appear in the Delta S=2 effective weak Hamiltonian of the Standard Model. Our calculations are done using O(a) improved Wilson fermions with N_f=2 dynamical flavours. Preliminary results are presented for the four-fermion operator which determines the B_K parameter in tmQCD.

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