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Status of the DeeMe experiment to search for $\mu$-$e$ conversion at J-PARC MLF

8 Sept 2021, 12:40
30m
Parallel 4

Parallel 4

Oral WG 4

Speaker

Dr Natsuki Teshima (Osaka City University)

Description

The DeeMe experiment aims to search for one of the charged lepton flavor violating processes, muon to electron conversion in the field of a nucleus. Our goal is to measure the process with a single event sensitivity of $1 \times 10^{-13}$ for a graphite target with a novel method, with which the final sensitivity could reach down to a level of $10^{-15}$ for a silicon carbide target. That is one or two orders of magnitude better than the current upper limits, $7 \times 10^{-13}$ for a gold target by the SINDRUM-II experiment at PSI and $4.6 \times 10^{-12}$ for a titanium target by the experiment at TRIUMF. The construction of the secondary beamline, H Line, is now in progress. Meanwhile, we measured the momentum spectrum of electrons through muon decay-in-orbit (DIO) for the momentum region 48--62 $\ \mathrm{MeV/}c$ at the D2 area, MLF. I will present the preparation status of DeeMe, the detector development, and the measurement of the DIO spectrum.

Working group WG4

Primary author

Dr Natsuki Teshima (Osaka City University)

Presentation materials