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

Abstract

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.

arXiv comment10 pages, 2 figures, final version to appear in Phys. Lett. B

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Cited by in corpus (9)

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• Semileptonic decays $B/B_s \to (η,\etar, G)(l^+l^-,l\barν,ν\barν)$ in the perturbative QCD approach beyond the leading order
• $|V_{ub}|$ and $B\to {\eta }^{{(}^{\prime })}$ Form Factors in Covariant Light Front Approach
• $B\to {\eta }^{(\prime )}({\ell }^{-}{\bar{\nu }}_{\ell },{\ell }^{+}{\ell }^{-},K,K^{\ast })$ decays in the quark-flavor mixing scheme
• Rare $B_s$ decays to $\eta$ and ${\eta }^{\prime }$ final states
• Constraints on the anomalous tensor operators from B\toϕK^{\ast}, ηK^{\ast}$ and ηK decays
• Semileptonic $B-\to p\bar{p}\ell -{\bar{\nu }}_{\ell }$ decays
• f_0(1710) production in exclusive B decays
• The semileptonic decays of $B/B_s$ meson in the perturbative QCD approach: A short review