Four fermion operator matching with nonrelativistic QCD heavy and asqtad light quarks

2008/04/09 by E. Gámiz, Elvira Gamiz, J. Shigemitsu +3
Physics and Astronomy · #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-lat

paper · pdf · doi:10.1103/physrevd.77.114505

published as Phys.Rev.D77:114505,2008 · 8 pages, 4 figures

arxiv created 2008/04/09 · openalex publication_date 2008/06/26 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28

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 \ensuremathα_s, \ensuremathΛ_QCD/M_b, and \ensuremathα_s/(aM_b).

Citations

• B-parameters of the complete set of matrix elements of (ΔB = 2) operators from the lattice