14691664
Status of the PRISM FFAG Design for the Next Generation Muon-to-Electron Conversion Experiment
The PRISM Task Force continues to study high 
intensity and high quality muon beams needed for next 
generation lepton flavour violation experiments. In the 
PRISM case such beams have been proposed to be 
produced by sending a short proton pulse to a pion 
production target, capturing pions and performing RF 
phase rotation on the resulting muon beam in an FFAG 
ring. This paper summarizes the current status of the 
PRISM design obtained by the Task Force. In particular 
various designs for the PRISM FFAG ring are discussed 
and their performance compared to the baseline one, the 
injection/extraction systems and matching to the solenoid 
channels upstream and downstream of the FFAG ring are 
presented. The feasibility of the construction of the 
PRISM system is discussed.
119500971
Possible existence of new medium interactions and 3.1- and 3.7-GeV particles
18393881
Intense Muon Physics Working Group Summary
The intense muon beams which will be available at a neutrino factory provide a unique opportunity for searching for physics beyond the standard model, both in lepton flavor violation and in the search for a permanent electric dipole moment for the muon. Other experiments which can use intense muon beams will also be possible.
121688519
Symmetries and the mass ratio of the electron and muon
A model of symmetries and gauge interactions relating the electron and muon is considered. The model is based on the UL(1)⊗UR(1)⊗RL⊗RR group where UL(1)⊗UR(1) denotes the chiral e-μ rotation and RL⊗RR the chiral reflection of the electron field. The invariance under this group is spontaneously broken by the vacuum expectation values of scalar fields. A zeroth-order vacuum is found for which the zeroth-order electron mass vanishes, while one-loop corrections lead to a finite memμ ratio. The decay process μ → e + γ is strictly forbidden in this model.
122497415
R&D on Proton Extinction Monitor for COMET Project
The COMET experiment searches for a muon to electron conversion process that is one of the lepton flavor violation processes. We use an 8‐GeV pulsed proton beam. The proton extinction ratio is an important parameter. In order to measure this ratio pulse‐by‐pulse, we are developing a monitoring device. This device is called Proton Extinction Monitor and is a gas Cerenkov detector with gating photomultiplier tubes(PMT). The result of the investigation is that ethane is a promising gas for the Cerenkov radiator gas. A gating PMT is under development. We fabricated a divider circuit which switches at 10‐kHz and has a cutoff ratio of 10−6.
162176254
Development on Electromagnetic Calorimeter for COMET / PRISM
126008905
An Asymmetric collider with the TRISTAN Main Ring