1. Mu3e Collaboration, A. Blondel, et al. Research Proposal for an Experiment to Search for the Decay μ→eee, arXiv:1301.6113.
2. Technical design of the phase I Mu3e experiment;Arndt;Nucl. Instrum. Methods,2021
3. Hamamatsu Photonics, https://www.hamamatsu.com/us/en/product/optical-sensors/mppc/mppc_mppc-array/S13552.html.
4. The use of scintillating fibers for charged-particle tracking;Ruchti;Annu. Rev. Nucl. Part. S.,1996
5. Positron electron balloon spectrometer;von Doetinchem;Nucl. Instrum. Methods A,2007