Veronesi Michele

08 May 2023

Abstract: We report updates on time-dependent CP-violation observables at Belle II. The benchmark measurements of the B0 lifetime τB0 and mixing frequency ∆md using flavor specific hadronic decays and the determination of the CP-violating phase sin2φ1 in b → ccs transitions have been performed using data collected between 2019–2021. These analyses use only half of the current available dataset and are still statistically limited, showing the excellent performance of the detector and readiness of the analysis tools. We present three new results on the effective value of sin2φ1 in b → qqs transitions, which are highly sensitive to generic non-Standard Model (SM) physics amplitudes, using the full dataset collected between 2019–2022.

Keyword(s): TDCPV Penguin Moriond 2023