Computation of Λ̄ and λ 1 with Lattice QCD
نویسنده
چکیده
We pursue a new method, based on lattice QCD, for determining the quantities Λ̄, λ1, and λ2 of heavy-quark effective theory. We combine Monte Carlo data for the meson mass spectrum with perturbative calculations of the short-distance behavior, to extract Λ̄ and λ1 from a formula from HQET. Taking into account uncertainties from fitting the mass dependence and from taking the continuum limit, we find Λ̄ = 0.57 −0.16 GeV and λ1 = −(1.32 +0.21 −0.84) GeV 2 in the quenched approximation. PACS numbers: 12.38.Gc, 12.39.Hg, 13.20.-v Typeset using REVTEX
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تاریخ انتشار 2000