Four Fermion Operator Matching with NRQCD Heavy and AsqTad Light Quarks

Abstract

We present one-loop matching coefficients between continuum and lattice QCD for the heavy-light four-fermion operators relevant for neutral B meson mixing both within and beyond the Standard Model. For the lattice theory we use nonrelativistic QCD (NRQCD) to describe b quarks and improved staggered fermions (AsqTad) for light quarks. The gauge action is the tree-level Symanzik improved gauge action. Matching to full QCD is carried out through order alpha_s, Lambda_{QCD}/M_b, and alpha_s/(aM_b).

8 pages, 4 figures

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Cited by in corpus (8)

• Neutral B Meson Mixing in Unquenched Lattice QCD
• $B_{(s)}^0$-mixing matrix elements from lattice QCD for the Standard Model and beyond
• Neutral B-meson mixing from three-flavor lattice QCD: Determination of the SU(3)-breaking ratio ξ
• Neutral $B$ mixing from 2+1 flavor lattice-QCD: the Standard Model and beyond
• Matching lattice and continuum four-fermion operators with nonrelativistic QCD and highly improved staggered quarks
• Neutral B mixing from 2+1 flavor lattice QCD
• Lattice QCD and Flavour Physics
• The Beauty of Lattice Perturbation Theory: The Role of Lattice Perturbation Theory in B Physics