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Scaling law for the $Υ(4S) \to B \bar B$ and $ψ(3770) \to D \bar D$ decay constants from effective sum rules

V. V. Kiselev
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Abstract

Sum rules for exclusive production of heavy meson pairs in $e^+e^-$ annihilation are used to evaluate the $Υ(4S) \to B \bar B$ and $ψ(3770) \to D \bar D$ decay widths. Infinitely heavy quark limit is discussed, so that scaling law for the quarkonium-meson coupling constant is derived. A value of the $B\bar B$ pair contribution into the leptonic constant $f_{Υ(4S)}$ is estimated.

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V. V. Kiselev. 1994-01-27. Scaling law for the $Υ(4S) \to B \bar B$ and $ψ(3770) \to D \bar D$ decay constants from effective sum rules. https://doi.org/10.1142/s021773239500226x

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