Application of heavy-quark effective theory to lattice QCD: Power corrections - art. no. 014505

Heavy-quark effective theory (HQET) is applied to lattice QCD with Wilson f ermions at fixed lattice spacing a. This description is possible because he avy-quark symmetries are respected. It is desirable because the ultraviolet cutoff 1/a in current numerical work and the heavy-quark mass m(Q) are com parable. Effects of both short distances a and 1/m(Q) are captured fully in to coefficient functions, which multiply the operators of the usual HQET. S tandard tools of HQET are used to develop heavy-quark expansions of lattice observables and, thus, to propagate heavy-quark discretization errors. Thr ee explicit examples are given: namely, the mass, decay constant, and semil eptonic form factors of heavy-light mesons.