Michele Veronesi | Searcharxiv

arXiv2025

Development and commissioning of a new readout system for the gas flow of the Belle II $K_L^0$ and muon detector

We have designed and commissioned a new readout board to detect photosensor signals from gas-bubbler panels to continuously monitor the gas flow through the resistive plate chambers of the $K_L^0$ and muon detector of Belle II. The gas flow measurements have been integrated into Belle II's alarm system. The bubbler-monitoring system was first employed during the February 2024 to July 2024 Belle II data-taking period.

hep-ex↗

arXiv2023

Time-dependent $CP$ violation results at Belle II

We report updates on time-dependent $CP$-violation observables at Belle II. The benchmark measurements of the $B^0$ lifetime $τ_{B^0}$ and mixing frequency $Δm_d$ using flavor specific hadronic decays and the determination of the $CP$-violating phase $\sin2ϕ_1$ in $b\to c\overline{c}s$ 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 $\sin2ϕ_1$ in $b\to q\overline{q}s$ transitions, which are highly sensitive to generic non-Standard Model (SM) physics amplitudes, using the full dataset collected between 2019-2022.

hep-ex↗