Lattice B-parameters for ΔS=2 and ΔI=3/2 operators
نویسندگان
چکیده
منابع مشابه
B-parameters of 4-fermion operators from lattice QCD
Reliable estimates of the matrix elements of 4-fermion operators between hadronic states are essential in order to quantify strong interaction corrections to weak processes. Here we report on calculations of mixing elements of (i) ∆s = 2 operators between K and K̄0 states (BK) that arise in the calculation of the CP violation parameter ǫ. The value of BK is an essential input in pinning down the...
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The matrix element which determines the B meson decay constant can be measured on the lattice using an effective field theory for heavy quarks. Various discretizations of the heavy-light bilinears which appear in this and other B decay matrix elements are possible. The heavy-light bilinear currently used for the determination of the B meson decay constant on the lattice suffers a substantial on...
متن کاملLattice B - parameters for ∆ S = 2 and ∆ I = 3 / 2 Operators
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 B K (B 3/...
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We compute on the lattice the “bag” parameters of the five ∆B = 2 operators of the supersymmetric basis, by combining their values determined in full QCD and in the static limit of HQET. The extrapolation of the QCD results from the accessible heavy-light meson masses to the B-meson mass is constrained by the static result. The matching of the corresponding results in HQET and in QCD is for the...
متن کاملB - parameters for ∆ S = 2 Supersymmetric Operators
We present a calculation of the matrix elements of the most general set of ∆S = 2 dimension-six four-fermion operators. The values of the matrix elements are given in terms of the corresponding B-parameters. Our results can be used in many phenomenological applications, since the operators considered here give important contributions to K 0 – ¯ K 0 mixing in several extensions of the Standard M...
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ژورنال
عنوان ژورنال: Physics Letters B
سال: 1998
ISSN: 0370-2693
DOI: 10.1016/s0370-2693(98)00019-7