Abstract
Lepton Flavour Violation in the charged lepton sector (CLFV) is forbidden in the Standard Model. Therefore, the observation of CLFV process would be clear evidence of physics beyond the Standard Model. The COMET (COherent Muon to Electron Transitions) experiment will measure one of these processes: µN → eN at the Japan Proton Accelerator Research Complex in Tokai, Japan. The COMET experiment will be carried out using a two-staged approach. Phase-I of the experiment is aiming at a signal sensitivity of 3.1 × 10−15. Phase-II will use much more intense beam and a more complex transport system to achieve a single-event sensitivity of 3 × 10−17. The article gives an overview of construction and status of the COMET experiment.
Highlights
In spite of all the successes of the Standard Model (SM) related to discovery of a Higgs boson at the LHC [1],[2] it is unlikely to be the final theory of fundamental particles and their interactions that could be applicable at all energy scales
Lepton flavor violation (LFV) in the neutrino sector has been experimentally confirmed with the discovery of neutrino oscillations [3]
The COMET experiment will produce muon beam from the pions decay generated in the collisions of protons with a production target made of graphite for COMET Phase-I, and a tungsten target in Phase-II
Summary
In spite of all the successes of the Standard Model (SM) related to discovery of a Higgs boson at the LHC [1],[2] it is unlikely to be the final theory of fundamental particles and their interactions that could be applicable at all energy scales. Within the framework of the SM still leaves many unanswered questions, notably: there is not any promising dark-matter candidate, no explanation for the observed matter antimatter asymmetry in the Universe, SM does not explain gravity and neutrino masses. These facts demand physics beyond the Standard Model (BSM). This is a factor of 104 better than the current limit from SINDRUM-II at PSI [5]
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