2-9 July 2014
Valencia, Spain
Europe/Madrid timezone

Search for Muon to Electron Conversion in Nuclear Field at J-PARC MLF

5 Jul 2014, 10:30
Sala 6+7 ()

Sala 6+7

Oral presentation Lepton Flavour Violation Lepton Flavour Violation


Dr. Yohei Nakatsugawa (High Energy Accelerator Research Organization (KEK))


A new experiment to search for muon to electron conversion in nuclear field, DeeMe, is proposed at J-PARC Materials and Life Science Experimental Facility (MLF). This experiment will be carried out at a brand-new beamline (H-Line) which will be constructed at J-PARC MLF Muon Science Establishment (MUSE). Muonic atoms formed in a muon production target will be utilized. The signal electrons from muon to electron conversion will be captured and transported to a spectrometer by the beamline. The single event sensitivity which will be achieved by DeeMe experiment is estimated to be 2x10^{-14} with a silicon carbide (SiC) muon production target and 1 year data acquisition, while the current upper limit is of the order of 10^{-13}. The preparation of the experiment is in progress. The simulation studies for beamline optics, background estimation and spectrometer calibration were performed. Some performance tests of the prototype of tracking device (MWPC) have been done and further R&D is ongoing. The SiC muon production target is under development. The current graphite target of MLF MUSE will be replaced with a SiC target in order to improve physics sensitivity of the experiment and the preparation for the replacement is also ongoing. DeeMe already has Stage-2 approval from PAC under KEK-IMSS (Institute of Materials Structure Science), and the experiment will start data taking in 2015.

Primary author

Dr. Yohei Nakatsugawa (High Energy Accelerator Research Organization (KEK))

Presentation Materials


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