Muon to Electron Conversion at Imperial College London

About Muon to Electron Conversion

Muon to electron conversion is a process not included in the Standard Model. Typical muon flavor-violating decays are μ⁺ → e⁺ + γ, μ⁺ → e⁺+e⁺+e^- and μ^-+ N(A,Z) → e^- + N(A,Z).

If the Standard Model is extended to incorporate neutrino mixing, charged lepton flavor-violating branching ratios are predicted to be non-zero but extremely small, i.e. of the order of <10^-52. However, Beyond the Standard Model theories predict charged lepton flavor-violating branching ratios to be much larger. Current measurements of muon processes have set an upper limit on the branching ratio of flavor-violating decays to be around 10^-12. The most promising way of improving this is the measurement of coherent muon-to-electron conversion, i.e. μ^-+ N(A,Z) → e^- + N(A,Z). Experiments being proposed aim to improve the current branching ratio limit by a factor of 10⁴.

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News

• PRISM-FFAG Muon-to-Electron Conversion Workshop at Imperial College 1, 2 July 2009
  
  • Please see Jaroslaw Pasternak's summary of the meeting.

Documents

• The COMET Conceptual Design Report (June 2009)
• The COMET Conceptual Design Report (June 2009, with hyperlinks)

Links

• The COMET Experiment
• The Muon-to-Electron-Conversion UK Mailing List