A method to search for mu --> e gamma decays with high intensity muon sources

DeJongh, Fritz ; /Fermilab

Fermi National Accelerator Laboratory

关键词: 46 Instrumentation Related To Nuclear Science And Technology;    Dead Time;    Photons;    Experiment-Hep, Instrumentation;    Gamma Decay;   

DOI  :  10.2172/15020215
RP-ID  :  FERMILAB-TM-2292-E
RP-ID  :  AC02-76CH03000
RP-ID  :  15020215

美国|英语

来源: UNT Digital Library

【 摘 要 】

Muon beamlines such as the one being designed for the MECO experiment will provide a large increase in muon stopping rates, allowing for possible large increases in sensitivity to {mu} {yields} e{gamma}. As higher-power proton-drivers become available, even higher rates will become possible. We have analyzed the capabilities of a detector for {mu} {yields} e{gamma} using pixel detectors to track the positron, and a conversion pair from the photon. We find that an initial detector with a beamline comparable to MECO and 10% of the coverage of the MEGA experiment can already be competitive with experiments currently under construction with a modest amount of live-time. By increasing the coverage and running longer, it should be possible to go further. We have found that the accidental backgrounds depend strongly on the thickness of the photon converter, providing a way to make continued major progress as improved pixel detectors and more intense muon sources become available.