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Accueil > Recherche > (GRIFON) GRoupe Interactions FOndamentales et nature du Neutrino

COMET (english)

COMET ((COherent Muon to Electron Transition)

In parallel to the direct searches for New Physics currently being carried at the high energy frontier (LHC and future colliders), several experiments are looking for Beyond the Standard Model signals at the high-intensity frontier. Since it is forbidden in the Standard Model (SM), and strongly suppressed in minimal SM extensions capable of accounting for neutrino oscillation data, charged lepton flavour violation (cLFV) emerges as a very clear signal of New Physics.
The potential of cLFV observables as privileged probes of New Physics is vast : firstly, they could constitute a striking discovery (even before direct evidence at the LHC) ; secondly, cLFV observables have the capacity to probe New Physics constructions with a typical scale lying beyond collider reach ; finally, cLFV information (be it in the form of an observation, or improved experimental bounds) would contribute with complementary information to the results coming from direct searches at high-energy facilities (LHC and beyond).
The muon sector offers numerous cLFV channels (rare decays and transitions), and the advent of very intense muon beams render it one of the best laboratories to look for cLFV. At the Japan Proton Accelerator Research Complex (J-PARC) in Tokai, the COMET experiment will look for neutrinoless muon-electron conversion using aluminum targets.
COMET is an international collaboration of more than 200 collaborators through 41 institutes and 17 countries. The spokesperson for this experiment is Yoshitaka Kuno Department of Physics, Osaka University. The experiment is planned to take place in two phases. Phase 1 is scheduled to start in 2020. In France, collaboration COMET-France includes physicists and engineers from five IN2P3 / CNRS laboratories : the LPNHE in Jussieu, the LP Clermont, the IPNL Lyon, the IN2P3 computer center in Villeurbanne and the LPC Caen.
The LPC Caen is involved in this project particularly through its contribution in the Monte Carlo simulations to know precisely the flow and the energy spectrum of the different particles produced during the experiment allowing to estimate the doses received and therefore the irradiation resistance of all the constituents of the experimental devices present in the set-up receiving the particle flow.
For more details about COMET, we can look recent documents related to this experiment
COMET - A submission to the 2020 update of the European Strategy for Particle Physics on behalf of the COMET collaboration :
COMET Phase-I Technical Design Report :

And other interesting papers about COMET experiment can find at this link;:%27COMET%27&amp ;ln=fr
A other paper to the 2020 update of the European Strategy for Particle Physics on behalf of the COMET, MEG, Mu2e and Mu3e collaborations about Charged Lepton Flavour Violation using Intense Muon Beams at Future Facilities

Contact : "jean-claude ANGELIQUE