Abstract:This note describes the rediscovery of B → η K decays in Belle II data, both in the charged and neutral final state: B 0 → η K 0 S and B ± → η K ± . The η is searched for in two decay modes: η → ηπ + π − with η → γγ, and η → ργ. The analysis uses data collected in 2019 and 2020 at the SuperKEKB asymmetric e + e − collider, with an integrated luminosity of 62.8 fb −1 , corresponding to 68.2 million of BB pairs produced. The signal yield is obtained via an unbinned maximum likelihood fit to signal sensitive vari… Show more
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