Lattice QCD yields continuum-limit HQET LCDA parameters λ_B = 0.340(20) GeV and σ_B^(1) = 1.685(63) at 1 GeV, reducing total uncertainty by a factor of three.
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Continuum-Limit HQET LCDAs from Lattice QCD for Tightening B Decay Uncertainties
Lattice QCD yields continuum-limit HQET LCDA parameters λ_B = 0.340(20) GeV and σ_B^(1) = 1.685(63) at 1 GeV, reducing total uncertainty by a factor of three.
- Determination of $B$-meson distribution amplitudes from $B\to \pi,K,D$ transition form factors