Test of lepton universality and search for lepton flavor violation in ϒ(1S,2S,3S) decays at CLEO

Dankó, I.

doi:10.1063/1.2220361

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J/ψ → τ µ and υ → τ µ1

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2006

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“…LL ∼ O(1) and Λ LN /Λ LFV = 10 9 one expects Br(Υ → τ + µ − ) ∼ 10 −20 . All the hadronic modes we have considered here, for acceptable values of the ratios Λ LN /Λ LFV and vM ν /Λ LFV 2 and of the Wilson coefficients, are predicted to be well below foreseeable experimental sensitivities [12]. On one hand this result can be considered as a generic prediction of minimal lepton flavor violation and can be used in the future to test this framework (e.g.…”

Section: J/ψ → τ µ and υ → τ µmentioning

confidence: 71%

Phenomenology of minimal lepton flavor violation

Cirigliano

Grinstein

2006

Nuclear Physics B

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We extend the effective theory of Minimal Lepton Flavor Violation (MLFV) by including four-lepton operators. We compute the rates for µ → 3e and τ → 3ℓ decays and point out several new ways to test the hypothesis of MLFV. We also investigate to what extent it will be possible from (future) experimental information to pin down the contributions of different effective operators. In particular we look for experimental handles on quark-lepton operators of the typel i Γℓ j ×qΓq by working out their contribution to hadronic processes such as τ → µπ 0 , π 0 → µē, Υ → τμ, as well as to purely leptonic decays such as µ → 3e through loop effects.

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Section: J/ψ → τ µ and υ → τ µmentioning

confidence: 71%