Abstract
Finite energy QCD sum rules with Legendre polynomial integration kernels are used to determine the heavy meson decay constant \( {f}_{B_c} \), and revisit f B and \( {f}_{B_s} \). Results exhibit excellent stability in a wide range of values of the integration radius in the complex squared energy plane, and of the order of the Legendre polynomial. Results are \( {f}_{B_c} \) = 528 ± 19 MeV, f B = 186 ± 14 MeV, and \( {f}_{B_s} \) = 222 ± 12 MeV.
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Baker, M.J., Bordes, J., Dominguez, C.A. et al. B meson decay constants \( {f}_{B_c} \), \( {f}_{B_s} \) and f B from QCD sum rules. J. High Energ. Phys. 2014, 32 (2014). https://doi.org/10.1007/JHEP07(2014)032
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DOI: https://doi.org/10.1007/JHEP07(2014)032