We compute several matrix elements of dimension-six four-fermion operators and extract their B-parameters. The calculations have been performed with the tree-level Clover action at β = 6.0. The renormalization constants and mixing coefficients of the lattice operators have been obtained non-perturbatively. In the MS renormalization scheme, at a renormalization scale μ ≃ 2 GeV, we find BK (B3/29) = 0.66(11), B3/27 = 0.72(5) and B3/28 = 1.03(3). The result for B3/28 has important implications for the calculation of ∈′/∈. © 1998 Elsevier Science B.V.
Lattice B-parameters for ΔS = 2 and ΔI = 3/2 operators
Conti, L.;
1998-01-01
Abstract
We compute several matrix elements of dimension-six four-fermion operators and extract their B-parameters. The calculations have been performed with the tree-level Clover action at β = 6.0. The renormalization constants and mixing coefficients of the lattice operators have been obtained non-perturbatively. In the MS renormalization scheme, at a renormalization scale μ ≃ 2 GeV, we find BK (B3/29) = 0.66(11), B3/27 = 0.72(5) and B3/28 = 1.03(3). The result for B3/28 has important implications for the calculation of ∈′/∈. © 1998 Elsevier Science B.V.File in questo prodotto:
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