Speaker
Description
he MEG II experiment, which focuses on investigating Charged Lepton Flavour Violation in muon decays, completed the commissioning of all subdetectors in time for the 2021 run. Recently, it concluded the second year of data collection at the Paul Scherrer Institut (CH).
The experimental apparatus has been specifically designed to search for $\mu^+ \rightarrow e^+ \gamma$ decays, aiming for a significant improvement over the current sensitivity of $4.2 \times 10^{-13}$. This requires high-performance and lightweight detectors capable of handling the pileup effect.
In this presentation, I will provide a brief overview of the experimental techniques employed and share the lessons learned from operating the detectors in a high-rate environment. Subsequently, I will describe the analysis approach applied to the 2021 dataset. Although we collected only few weeks of data in 2021, we anticipate achieving a sensitivity of $8.5 \times 10^{-13}$, although our analysis will be strongly limited by available statistics. Currently, the data in the signal region are blinded, and we are preparing the Likelihood analysis using signal sidebands. The MEG experiment's current limit is twice as good as what we can achieve with the 2021 dataset but relies on the complete dataset spanning approximately four years. However, the 2021 data provides a unique opportunity to fine-tune the analysis procedure and address systematic uncertainties as the collaboration works towards improving statistical precision.
Finally, I will present the data-taking plan for MEG II, which will continue until the end of 2026, to achieve a sensitivity of $6 \times 10^{-14}$. Additionally, I will touch upon some potential other searches being considered by the MEG II collaboration, extending beyond the $\mu^+ \rightarrow e^+ \gamma$ decay channel.
| Collaboration / Activity | MEG II |
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