Physics – High Energy Physics – High Energy Physics - Lattice
Scientific paper
2011-11-02
Physics
High Energy Physics
High Energy Physics - Lattice
7 pages, 3 figures, LATTICE 2011 conference
Scientific paper
The Fermilab Lattice-MILC collaboration is completing a comprehensive program of heavy-light physics on the MILC (2+1)-flavor asqtad ensembles with lattice spacings as small as 0.045 fm and light-to-strange-quark mass ratios as low as 1/20. We use the Fermilab interpretation of the clover action for heavy valence quarks and the asqtad action for light valence quarks. The central goal of the program is to provide ever more exacting tests of the unitarity of the CKM matrix. We give a progress report on one part of the program, namely the analysis of the semileptonic decay B to D at both zero and nonzero recoil. Although final results are not presented, we discuss improvements in the analysis methods, the statistical errors, and the parameter coverage that we expect will lead to a significant reduction in the final error for |V_cb| from this decay channel.
de Water Ruth S. Van
DeTar Carleton
Du Daping
for the Fermilab Lattice Collaboration
for the MILC Collaboration
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