Precision lattice QCD computation of the B⁎Bπ coupling

@article{Bernardoni2015PrecisionLQ,
  title={Precision lattice QCD computation of the B⁎Bπ coupling},
  author={Fabio Bernardoni and John Bulava and Michael Donnellan and Rainer Sommer},
  journal={Physics Letters B},
  year={2015},
  volume={740},
  pages={278-284}
}
  • Fabio Bernardoni, John Bulava, +1 author Rainer Sommer
  • Published 2015
  • Physics
  • Physics Letters B
  • The static B ∗ Bπ coupling, ˆ gχ , a low energy constant in the leading order heavy meson chiral Lagrangian, is determined using Nf = 2l attice QCD. We use CLS ensembles with lattice spacings and pion masses down to a = 0.05 fm and mπ = 270 MeV, and perform combined continuum and chiral extrapolations of our results which have a much better accuracy than previous numbers in the literature. As a by-product, we determine the coupling between the first radial excitations in the B and B ∗ channels… CONTINUE READING

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