Lepton-flavor violation in supersymmetric models with trilinear<b><i>R</i></b>-parity violation

Gouvêa, André de; Lola, S.; Tobe, Kazuhiro

doi:10.1103/physrevd.63.035004

Cited by 88 publications

(96 citation statements)

References 113 publications

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“…Because of the contributions C ln Λ and Cλ, the ratio BR(µ → eēe)/BR(µ → eγ) can be significantly larger than 10 −1 if Λ > ∼ 1 TeV orλ > g. This is very different from predictions for lepton flavour violating processes from SUSY models with slepton flavour mixing, in which the contribution C µ→eγ is almost always dominant [40] and therefore BR(µ → eēe)/BR(µ → eγ) ≃ 6 × 10 −3 . Large contributions to BR(µ → eēe) may be obtained in SUSY models with R-parity violation [41].…”

Section: Flat Extra Dimensionsmentioning

confidence: 99%

Phenomenological implications of neutrinos in extra dimensions

et al. 2002

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Standard Model singlet neutrinos propagating in extra dimensions induce small Dirac neutrino masses. While it seems rather unlikely that their Kaluza-Klein excitations directly participate in the observed neutrino oscillations, their virtual exchange may lead to detectable signatures in future neutrino experiments and in rare charged lepton processes. We show how these effects can be described by specific dimension-six effective operators and discuss their experimental signals.

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Section: Flat Extra Dimensionsmentioning

confidence: 99%

Phenomenological implications of neutrinos in extra dimensions

et al. 2002

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“…However, it is well known that it is possible to probe on CPV in the leptonic sector by adopting an effective Lagrangian approach to extract some information on the CP-violating structure of the LFV effective operators (de Gouvea et al, 2001;Okada et al, 2000;Treiman et al, 1977;Zee, 1985). For instance, this can be achieved by measuring the polarization of the final-state particles in µ → eγ (Ayazi and Farzan, 2009; and µ-e conversion in nuclei (Davidson, 2008).…”

Section: Lepton Flavor Violation and Seesaw Neutrino Massesmentioning

confidence: 99%

LeptonicCPviolation

Branco¹,

Felipe

Joaquim³

2012

Rev. Mod. Phys.

202

188

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Several topics on CP violation in the lepton sector are reviewed. A few theoretical aspects concerning neutrino masses, leptonic mixing, and CP violation will be covered, with special emphasis on seesaw models. A discussion is provided on observable effects which are manifest in the presence of CP violation, particularly, in neutrino oscillations and neutrinoless double beta decay processes, and their possible implications in collider experiments such as the LHC. The role that leptonic CP violation may have played in the generation of the baryon asymmetry of the Universe through the mechanism of leptogenesis is also discussed.

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“…[14]. Hence, for generic flavor structure of the couplings λ and λ ′ the underlying LNV dynamics generate both short distance contributions to 0νββ and LFV contributions that lead to R ≫ 10 −2 .…”

Section: Rpv Susy -If One Does Not Impose R-parity Conservation [R = mentioning

confidence: 99%

Neutrinoless Double Beta Decay and Lepton Flavor Violation

et al. 2004

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We point out that extensions of the Standard Model with low scale (∼ TeV) lepton number violation (LNV) generally lead to a pattern of lepton flavor violation (LFV) experimentally distinguishable from the one implied by models with GUT scale LNV. As a consequence, muon LFV processes provide a powerful diagnostic tool to determine whether or not the effective neutrino mass can be deduced from the rate of neutrinoless double beta decay. We discuss the role of µ → eγ and µ → e conversion in nuclei, which will be studied with high sensitivity in forthcoming experiments.In the past few years convincing experimental evidence for neutrino oscillations has been collected [1], implying that neutrinos are massive particles, with masses much smaller than those of other known fermions. Since the Standard Model of particle physics assumes that neutrinos are massless, the study of neutrino mass and the properties of massive neutrinos provides important clues about a more fundamental theory that goes beyond the Standard Model. Among the most urgent open questions in neutrino physics are the determination of (i) neutrino charge conjugation properties (Dirac or Majorana) and (ii) the absolute mass scale in the spectrum.The study of neutrinoless double beta decay (0νββ) can help addressing these issues. For one, observation of this ∆L = 2 process would establish the existence of total lepton number violation (LNV), thereby implying that neutrinos are massive Majorana particles [2]. Ideally, the observation of 0νββ would also help determine the absolute scale of neutrino mass, since the total decay rate (Γ 0νββ ) arising from light Majorana neutrinos is proportional to the square of the effective mass, m ββ (defined precisely below). It has long been recognized, however, that the extraction of m ββ from Γ 0νββ is problematic, since LNV interactions involving heavy (∼ TeV) particles can make comparably important contributions to the rate. Thus, in the absence of additional information about the mechanism responsible for 0νββ, one could not unambiguously infer m ββ from Γ 0νββ .In this Letter, we show that experimental searches for lepton flavor violation (LFV) involving charged leptons can help to address this problem by providing a powerful "diagnostic tool" for establishing the 0νββ mechanism. Here, we focus on the Standard Modelforbidden processes µ → eγ and µ → e conversion in nuclei that will be studied with unprecedented sensitivity in the forthcoming MEG [3] and MECO [4] experiments, respectively. The relevant branching ratios are B µ→eγ = Γ(µ → eγ)/Γ (0) µ and B µ→e = Γ conv /Γ capt , where µ → eγ is normalized to the standard muon decay rate, while µ → e conversion is normalized to the capture rate Γ capt . The new experiments will probe B µ→eγ and B µ→e at levels that would be sensitive to the effects of LFV induced by interactions involving TeV scale particles. Since models for the generation of Majorana neutrino masses typically also imply the existence of such interactions, studies of charged lepton LFV can also provi...

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Lepton-flavor violation in supersymmetric models with trilinearR-parity violation

Cited by 88 publications

References 113 publications

Phenomenological implications of neutrinos in extra dimensions

Phenomenological implications of neutrinos in extra dimensions

LeptonicCPviolation

Neutrinoless Double Beta Decay and Lepton Flavor Violation

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