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

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

1994-01-27

arxiv.org/abs/hep-ph/9401339v1

Mod.Phys.Lett.A10:2113-2124,1995

Physics

High Energy Physics

High Energy Physics - Phenomenology

14 pages, 1 Fig., Standard LATEX

Scientific paper

10.1142/S021773239500226X

Sum rules for exclusive production of heavy meson pairs in $e^+e^-$ annihilation are used to evaluate the $\Upsilon(4S) \to B \bar B$ and $\psi(3770) \to D \bar D$ 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 $f_{\Upsilon(4S)}$ is estimated.

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