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Paper   IPM / Physic / 8420
School of Physics
  Title:   Tracing CP-violation in Lepton Flavor Violating Muon Decays
  Author(s):  Y. Farzan
  Status:   Published
  Journal: JHEP
  Vol.:  07
  Year:  2007
  Pages:   054
  Supported by:  IPM
Although the Lepton Flavor Violating (LFV) decay μ+e+ γ is forbidden in the Standard Model (SM), it can take place within various theories beyond the SM. If the branching ratio of this decay saturates the present bound on it [i.e., Br(μ+e+γ) ∼ 10−11] the forthcoming experiments can measure the branching ratio with high precision and consequently yield information on the sources of LFV. In this letter, we show that for polarized μ+, by studying the angular distribution of the transversely polarized positron and linearly polarized photon we can derive information on the CP-violating sources beyond those in the SM. We also study the decay μ+e+1 e e+2 where e+1 is defined to be the more energetic positron. We show that for transversely polarized e1+, we can also derive information on the phases of the underlying theory by studying the angular distribution of the final particles.

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