Speaker
Description
The MEG II experiment at the Paul Scherrer Institute (PSI) has set the world's best upper limit on the branching ratio of the Charged Lepton Flavor Violating (CLFV) decay $\mu^+\rightarrow e^+\gamma$, reaching $\mathcal{B}$($\mu^+\rightarrow e^+\gamma$)$<3.1\times{10}^{-13}$ at 90% confidence level. While MEG II aims to achieve a sensitivity of $6\times{10}^{-14}$ by 2026, next-generation experiments will require muon beam intensities of $O(10^{10})\mu/s$ to push the sensitivity further. Operating in such high-rate environments demands a complete rethinking of the detector design, particularly for photon reconstruction.
A promising approach for future high-rate $\mu^+\rightarrow e^+\gamma$ searches is to reconstruct the signal photon via its conversion into $e^+e^-$ pairs, tracking the produced leptons to precisely measure the photon energy and direction. This technique places stringent requirements on the tracking detector: it must be lightweight, compact, and capable of sustaining high particle fluxes without performance degradation.
This poster presents the ongoing development of a Time Projection Chamber (TPC) with radial drift readout by cylindrical Micro Pattern Gaseous Detectors (MPGD) with stereo strips as a candidate solution.