Probing the supersymmetric type III seesaw: LFV at low-energies and at the LHC

Abada, Asmâa; Figueiredo, A. J. R.; Romão, Jorge C.; Teixeira, Ana

doi:10.1007/jhep08(2011)099

Cited by 16 publications

(17 citation statements)

References 68 publications

(84 reference statements)

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“…eÞ [14] from the MEG experiment, 4 times more stringent than the previous one [16]. Within the supersymmetric framework, one should also keep in mind other possibilities for observing LFV processes, such as slepton pair production at a linear collider (LC) [17][18][19][20][21][22][23][24] and signals at the LHC [25][26][27][28][29][30][31][32], particularly in 2 ! þ e AE Ç 2 !…”

Section: Introductionmentioning

confidence: 99%

Neutrino textures and charged lepton flavor violation in light ofθ13, MEG, and LHC data

et al. 2013

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In light of recent results from the LHC, MEG and neutrino experiments, we revisit the issue of charged lepton flavor violation (LFV) in supersymmetric theories with massive neutrinos, where flavorviolating soft supersymmetry-breaking masses for sleptons are induced naturally by radiative corrections. We link our results to the expectations for light neutrinos with a normal mass hierarchy in SU(5), enhanced by an Abelian flavor symmetry, with particular focus on 13 . We focus on the radiative decays ' i ! ' j and on detection prospects at the LHC and a linear collider (LC). We use supersymmetric parameters consistent with cosmological considerations and with LHC searches for supersymmetry and the Higgs mass. We find a class of scenarios where the LHC may be sensitive to LFV sparticle decays and LFV processes could be detectable at a LC with center-of-mass energy above 1 TeV, whereas LFV lepton decays may be suppressed by cancellations in the decay amplitudes.

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Section: Introductionmentioning

confidence: 99%

Neutrino textures and charged lepton flavor violation in light ofθ13, MEG, and LHC data

et al. 2013

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“…At high-energy colliders, slepton flavour mixing can be directly probed throughl Li → ℓ j χ 0 1 decays [32,35,37,39,40,44,45]. At the LHC sleptons are preferably produced in cascade decays of the formq L → {χ 0 2 , χ ± 1 }q ′ →l L {ℓ, ν}q ′ , provided that these are kinematically allowed.…”

Section: Jhep01(2014)015mentioning

confidence: 99%

“…Among the former one has flavour violating radiative and three body lepton decays, as well as muon-electron conversion in nuclei ; the latter are associated to the potential reconstruction of SUSY decay chains involving slepton intermediate states, and include various observables, such as for example flavoured slepton mass differences and direct flavour violating gaugino decays [31][32][33][34][35][36][37][38][39][40][41][42][43][44][45].…”

Section: Introductionmentioning

confidence: 99%

Slepton mass splittings and cLFV in the SUSY seesaw in the light of recent experimental results

Figueiredo

Teixeira

2014

J. High Energ. Phys.

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Following recent experimental developments, in this study we re-evaluate if the interplay of high-and low-energy lepton flavour violating observables remains a viable probe to test the high-scale type-I supersymmetric seesaw. Our analysis shows that fully constrained supersymmetric scenarios no longer allow to explore this interplay, since recent LHC data precludes the possibility of having sizeable slepton mass differences for a slepton spectrum sufficiently light to be produced, and in association to BR(µ → eγ) within experimental reach. However, relaxing the strict universality of supersymmetric soft-breaking terms and fully exploring heavy neutrino dynamics, still allows to have slepton mass splittings O(few %), for slepton masses accessible at the LHC, with associated µ → eγ rates within future sensitivity. For these scenarios, we illustrate how the correlation between high-and low-energy lepton flavour violating observables allows to probe the high-scale supersymmetric seesaw.

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“…Moreover, cLFV has also been studied in high-energy observables [40][41][42][43][44][45][46][47][48][49][50][51][52], as those that can be probed at the LHC as, for instance, lepton flavour violating neutralino decays and slepton mass splittings. The impact of a type I seesaw on the SUSY Higgs spectrum has been recently discussed in [53].…”

Section: Jhep08(2012)138mentioning

confidence: 99%

“…Nevertheless, numerous slepton-dedicated studies have been conducted for the LHC, in particular focusing on the case in which sleptons are produced from gaugino decays. Hence, the studies of cLFV observables are necessarily associated with specific decay chains that only occur in (reduced) regions of the SUSY parameter space: in general, cLFV is studied through dilepton mass distributions (m ℓℓ ) of χ 0 2 → ℓ i ℓ j χ 0 1 , via observables such as additional edges in m ℓℓ and slepton mass splittings (see, for example [42,[44][45][46][47][48][49][50]). …”

Section: Jhep08(2012)138mentioning

confidence: 99%

Lepton flavour violation: physics potential of a Linear Collider

Abada

Figueiredo

Romão³

et al. 2012

J. High Energ. Phys.

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Abstract:We revisit the potential of a Linear Collider concerning the study of lepton flavour violation, in view of new LHC bounds and of the (very) recent developments in lepton physics. Working in the framework of a type I supersymmetric seesaw, we evaluate the prospects of observing seesaw-induced lepton flavour violating final states of the type e µ plus missing energy, arising from e + e − and e − e − collisions. In both cases we address the potential background from standard model and supersymmetric charged currents. We also explore the possibility of electron and positron beam polarisation. The statistical significance of the signal, even in the absence of kinematical and/or detector cuts, renders the observation of such flavour violating events feasible over large regions of the parameter space. We further consider the µ − µ − + E T miss final state in the e − e − beam option finding that, due to a very suppressed background, this process turns out to be a truly clear probe of a supersymmetric seesaw, assuming the latter to be the unique source of lepton flavour violation.

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Probing the supersymmetric type III seesaw: LFV at low-energies and at the LHC

Cited by 16 publications

References 68 publications

Neutrino textures and charged lepton flavor violation in light ofθ13, MEG, and LHC data

Neutrino textures and charged lepton flavor violation in light ofθ13, MEG, and LHC data

Slepton mass splittings and cLFV in the SUSY seesaw in the light of recent experimental results

Lepton flavour violation: physics potential of a Linear Collider

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