Four Fermion Operator Matching with NRQCD Heavy and AsqTad Light Quarks

Details Four Fermion Operator Matching with NRQCD Heavy and AsqTad Light Quarks Four Fermion Operator Matching with NRQCD Heavy and AsqTad Light Quarks

2008-04-09

arxiv.org/abs/0804.1557v1

Phys.Rev.D77:114505,2008

Physics

High Energy Physics

High Energy Physics - Lattice

8 pages, 4 figures

Scientific paper

10.1103/PhysRevD.77.114505

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).

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