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Measurement of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>C</mml:mi><mml:mi>P</mml:mi></mml:math> asymmetries in <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msup><mml:mi>B</mml:mi><mml:mn>0</mml:mn></mml:msup><mml:mo stretchy="false">→</mml:mo><mml:mi>ϕ</mml:mi><mml:msubsup><mml:mi>K</mml:mi><mml:mi>s</mml:mi><mml:mn>0</mml:mn></mml:msubsup></mml:math> decays with Belle II
We present a measurement of time-dependent rate asymmetries in B0→ϕK0S decays to search for non-standard-model physics in b→q¯qs transitions. The data sample is collected with the Belle II detector at the SuperKEKB asymmetric-energy e+e− collider in 2019–2022 and contains (387±6)×106 bottom-antibottom mesons from Υ(4S) resonance decays. We reconstruct 162±17 signal …