Vorbereitung ethohydraulischer Untersuchungen

Adam, Beate; Lehmann, Boris

doi:10.1007/978-3-642-17210-6_6

Cited by 4 publications

(5 citation statements)

References 2 publications

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“…Note that this is a welcome feature since LFV processes of this type severely constrain models that generate neutrino masses radiatively [19]. This can be seen as the experimental constraint Br(µ → eγ) < 2.4 • 10 −12 [45] requires C 4 ∼ 1.5•10 −8 for M S = m 0 = 100 GeV. The flavor symmetry automatically reduces C 2 by a factor…”

Section: Radiative Lfv Decaysmentioning

confidence: 91%

Lepton flavor at the electroweak scale: A completeA4model

2013

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Apparent regularities in fermion masses and mixings are often associated with physics at a high flavor scale, especially in the context of discrete flavor symmetries. One of the main reasons for that is that the correct vacuum alignment requires usually some high scale mechanism to be phenomenologically acceptable. Contrary to this expectation, we present in this paper a renormalizable radiative neutrino mass model with an A 4 flavor symmetry in the lepton sector, which is broken at the electroweak scale. For that we use a novel way to achieve the VEV alignment via an extended symmetry in the flavon potential proposed before by two of the authors. We discuss various phenomenological consequences for the lepton sector and show how the remnants of the flavor symmetry suppress large lepton flavor violating processes. The model naturally includes a dark matter candidate, whose phenomenology we outline. Finally, we sketch possible extensions to the quark sector and discuss its implications for the LHC, especially how an enhanced diphoton rate for the resonance at 125 GeV can be explained within this model. 1 martin.holthausen@mpi-hd.mpg.de 2

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Section: Radiative Lfv Decaysmentioning

confidence: 91%

Lepton flavor at the electroweak scale: A completeA4model

2013

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“…LFV decays of charged leptons are allowed in several extensions of the SM, for instance supersymmetric models [217,218,219], left-right symmetric models [220] and models with heavy neutrinos [208,209,210,211]. Stringent upper limits on the decay µ − → e − γ have been set by the MEG experiment [221], while the most stringent upper limits on τ − → l − l + l − were set by the Belle experiment [222].…”

Section: Search For Lepton Flavour Violating and Very Rare Decaysmentioning

confidence: 99%

“…+ → K − µ + µ + ) 5.4 × 10 −8 (95%) LHCb [213] B(B + → π − µ + µ + ) 1.3 × 10 −8 (95%) LHCb [212] B(B + → π − e + e + ) 2.3 × 10 −8 (90%) BaBar [214] B(B + → K − e + e + ) 3.0 × 10 −8 (90%) BaBar [214] B(B + → D − µ + µ + ) 6.9 × 10 −7 (95%) LHCb [212] B(B + → D * − µ + µ + ) 2.8 × 10 −6 (95%) LHCb [212] B(B + → D − e + e + ) 2.6 × 10 −6 (90%) Belle [215] B(B + → D − µ + e + ) 1.8 × 10 −6 (90%) Belle [215] B(B + → D − s µ + µ + ) 5.8 × 10 −7 (95%) LHCb [212] B(B + → D 0 π − µ + µ + ) 1.5 × 10 −6 (95%) LHCb [212] B(D 0 → µ + µ + ) 1.3 × 10 −8 (95%) LHCb [224] B(B s → µ + µ − µ + µ − ) 1.3 × 10 −8 (95%) LHCb [223] B(B 0 → µ + µ − µ + µ − ) 5.4 × 10 −9 (95%) LHCb [223] B(τ − → µ − µ + µ − ) 2.1 × 10 −8 (90%) Belle [222] B(τ − → e − e + e −) 2.7 × 10 −8 (90%) Belle [222] B(τ − → e − µ + µ − ) 2.7 × 10 −8 (90%) Belle [222] B(τ − → e + µ − µ − ) 1.7 × 10 −8 (90%) Belle [222] B(τ − → µ + e − e − ) 1.5 × 10 −8 (90%) Belle [222] B(τ − → µ − e + e − ) 1.8 × 10 −8 (90%) Belle [222] B(µ − → e − γ)2.4 × 10 −12 (90%) MEG[221] …”

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confidence: 99%

Experimental constraints from flavour changing processes and physics beyond the Standard Model

Gersabeck

Serra²

2012

Eur. Phys. J. C

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Flavour physics has a long tradition of paving the way for direct discoveries of new particles and interactions. Results over the last decade have placed stringent bounds on the parameter space of physics beyond the Standard Model. Early results from the LHC, and its dedicated flavour factory LHCb, have further tightened these constraints and reiterate the ongoing relevance of flavour studies. The experimental status of flavour observables in the charm and beauty sectors is reviewed in measurements of CP violation, neutral meson mixing, and measurements of rare decays.

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“…Motivated by the excellent muon reconstruction capabilities and the recently improved upperlimit on µ → eγ [8], we studied the SUSY seesaw induced µ-e cLFV and its discovery potential at a LC working with polarisable beams [1].…”

Section: Introductionmentioning

confidence: 99%

Potential of a linear collider for lepton flavour violation studies in the susy seesaw

Figueiredo

Abada

Romão

et al. 2013

J. Phys.: Conf. Ser.

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We study the potential of an e ± e − Linear Collider for charged lepton flavour violation studies in a supersymmetric framework where neutrino masses and mixings are explained by a type-I seesaw. Focusing on e-µ flavour transitions, we evaluate the background from standard model and supersymmetric charged currents to the eµ + ET signal. We study the energy dependence of both signal and background, and the effect of beam polarisation in increasing the signal over background significance. Finally, we consider the µ − µ − + ET final state in e − e − collisions that, despite being signal suppressed by requiring two e-µ flavour transitions, is found to be a clear signature of charged lepton flavour violation due to a very reduced standard model background. This contribution summarises part of the work done in [1].

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Vorbereitung ethohydraulischer Untersuchungen

Cited by 4 publications

References 2 publications

Lepton flavor at the electroweak scale: A completeA4model

Lepton flavor at the electroweak scale: A completeA4model

Experimental constraints from flavour changing processes and physics beyond the Standard Model

Potential of a linear collider for lepton flavour violation studies in the susy seesaw

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