$η^{(\prime)}$ productions in semileptonic B decays

Details $η^{(\prime)}$ productions in semileptonic B decays $η^{(\prime)}$ productions in semileptonic B decays

2006-08-22

arxiv.org/abs/hep-ph/0608246v3

Phys.Lett.B645:197-200,2007

Physics

High Energy Physics

High Energy Physics - Phenomenology

10 pages, 2 figures, final version to appear in Phys. Lett. B

Scientific paper

10.1016/j.physletb.2006.12.044

Inspired by the new measurements on $B^{-}\to \eta^{(\prime)}\ell \bar\nu_{\ell}$ from the BaBar Collaboration, we examine the constraint on the flavor-singlet mechanism, proposed to understand the large branching ratios for $B\to \eta^{\prime} K$ decays. Based on the mechanism, we study the decays of $\bar B_{d,s}\to \eta^{(\prime)} \ell^{+} \ell^{-}$ and find that they are sensitive to the flavor-singlet effects. In particular, we show that the decay branching ratios of $\bar B_{d,s}\to \eta^{\prime} \ell^{+} \ell^{-}$ can be as large as $O(10^{-8})$ and $O(10^{-6})$, respectively.

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