Inspired by the new measurements on B-→ η(′)ℓ over(ν, ̄)ℓfrom the BaBar Collaboration, we examine the constraint on the flavor-singlet mechanism, proposed to understand the large branching ratios for B → η′K decays. Based on the mechanism, we study the decays of over(B, ̄)d, s→ η(′)ℓ+ℓ-and find that they are sensitive to the flavor-singlet effects. In particular, we show that the decay branching ratios of over(B, ̄)d, s→ η′ℓ+ℓ-can be as large as O (10-8) and O (10-6), respectively. © 2006 Elsevier B.V. All rights reserved.
Chen, C. H., & Geng, C. Q. (2007). η(′) productions in semileptonic B decays. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 645(2–3), 197–200. https://doi.org/10.1016/j.physletb.2006.12.044