New lattice action for heavy quarks

Details New lattice action for heavy quarks New lattice action for heavy quarks

2008-03-04

arxiv.org/abs/0803.0523v2

Phys.Rev.D78:014504,2008

Physics

High Energy Physics

High Energy Physics - Lattice

43 pp; v2 conforms with PRD version, improving plots and many minor things

Scientific paper

10.1103/PhysRevD.78.014504

We extend the Fermilab method for heavy quarks to include interactions of dimensions 6 and 7 in the action. There are, in general, many new interactions, but we carry out the calculations needed to match the lattice action to continuum QCD at the tree level, finding six non-zero couplings. Using the heavy-quark theory of cutoff effects, we estimate how large the remaining discretization errors are. We find that our tree-level matching, augmented with one-loop matching of the dimension-five interactions, can bring these errors below 1%, at currently available lattice spacings.

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