Model-independent analysis of lepton flavour violating τ decays

Dassinger, Benjamin M.; Feldmann, Thorsten; Mannel, Thomas; Turczyk, Sascha

doi:10.1088/1126-6708/2007/10/039

Cited by 44 publications

(36 citation statements)

References 25 publications

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“…3, 4, and 5): our results in this respect are very similar to those presented previously in Ref. [42].…”

Section: Discussionsupporting

confidence: 92%

“…The discrimination of different kinds of NP through a Dalitz plot analysis in LFV leptonic τ decays has been discussed in detail in Refs. [42,43]. …”

Section: The Leptonic Decay τ → 3µmentioning

confidence: 99%

“…Phenomenological analyses of LFV τ -decays within a generic EFT framework have also discussed the discrimination of NP scenarios by comparing the decay rates in different τ -decay modes [10,[41][42][43][44][45][46]. More information can be gathered by studying in detail the differential distributions in three-body decays.…”

Section: Introductionmentioning

confidence: 99%

“…More information can be gathered by studying in detail the differential distributions in three-body decays. For the leptonic decays, τ → ¯ , a Dalitz plot analysis can be used to distinguish different types of effective operators [42,43]. In semileptonic τ → ππ decays on the other hand, the pion invariant mass spectrum offers an alternative tool to separate different NP contributions.…”

Section: Introductionmentioning

confidence: 99%

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Model-discriminating power of lepton flavor violatingτdecays

2014

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Within an effective field theory framework, we discuss the possibility to discriminate among different operators that contribute to lepton flavor violating (LFV) τ decays. Correlations among decay rates in different channels are shown to provide a basic handle to unravel the origin of LFV in these processes. More information about the underlying dynamics responsible for LFV can be gathered from differential distributions in three-body decays like τ → µππ or τ → 3µ: these are considered in some detail. We incorporate in our analysis recent developments in the determination of the hadronic form factors for τ → µππ. Future prospects for the observation of LFV τ decays and its interpretation are also discussed. *

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“…3, 4, and 5): our results in this respect are very similar to those presented previously in Ref. [42].…”

Section: Discussionsupporting

confidence: 92%

“…The discrimination of different kinds of NP through a Dalitz plot analysis in LFV leptonic τ decays has been discussed in detail in Refs. [42,43]. …”

Section: The Leptonic Decay τ → 3µmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Model-discriminating power of lepton flavor violatingτdecays

2014

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“…Muon and tau decays with CLFV have been studied in a model independent way in the framework of higher dimensional operators [1][2][3] and in a general effective field theory description of the weak interactions at low energies [4]. Many scenarios of NP introduce additional sources of mixing between the lepton families that can easily lead to strong CLFV contributions.…”

Section: Introductionmentioning

confidence: 99%

Next-to-leading order prediction for the decay μ → e e + e − ν ν ¯ $$ \mu \to e\kern0.22em \left({e}^{+}{e}^{-}\right)\;\nu \kern0.2em \overline{\nu} $$

Fael

Greub

2017

J. High Energ. Phys.

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We present the differential decay rates and the branching ratios of the muon decay with internal conversion, µ → e (e + e − ) νν, in the Standard Model at next-to-leading order (NLO) in the on-shell scheme. This rare decay mode of the muon is among the main sources of background to the search for µ → eee decay. We found that in the phase space region where the neutrino energies are small, and the three-electron momenta have a similar signature as in the µ → eee decay, the NLO corrections decrease the leading-order prediction by about 10 − 20% depending on the applied cut.

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