Lattice QCD calculation demonstrates consistent standard model decay ratio R(D*) values in B meson decays, highlighting controlled systematic uncertainties.
The authors compute the semileptonic form factors for B→D* decay in lattice QCD with a sophisticated chiral fermion formulation. They control all systematic errors. They use their result to obtain a standard model prediction for the decay ratio R(D*) that is consistent with previous lattice QCD results.
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Aoki et al. (2024) studied this question.
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