Testing sterile neutrino extensions of the Standard Model at future lepton colliders

Antusch, Stefan; Fischer, Oliver

doi:10.1007/jhep05(2015)053

Cited by 170 publications

(218 citation statements)

References 71 publications

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“…[2,[6][7][8][9][10][11][12][13][14][15]). We revisit these constraints in hopes to offer self-consistent and precise results by performing a global combination of all relevant ratios of decay rates, using model-independent methods and the most up-to-date experimental measurements and theoretical predictions.…”

Section: A Tests Of Lepton Universalitymentioning

confidence: 99%

Global constraints on a heavy neutrino

2016

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We estimate constraints on the existence of a heavy, mostly sterile neutrino with mass between 10 eV and 1 TeV. We improve upon previous analyses by performing a global combination and expanding the experimental inputs to simultaneously include tests for lepton universality, lepton flavor violating processes, electroweak precision data, dipole moments, and neutrinoless double beta decay. Assuming the heavy neutrino and its decay products are invisible to detection, we further include, in a self-consistent manner, constraints from direct kinematic searches, the kinematics of muon decay, cosmology, and neutrino oscillations, in order to estimate constraints on the values of |Ue4| 2 , |Uµ4| 2 , and |Uτ4| 2 .

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Section: A Tests Of Lepton Universalitymentioning

confidence: 99%

Global constraints on a heavy neutrino

2016

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“…eq. (2.2)); these arise from non-standard neutrino interactions with matter, and have been derived in [52][53][54] by means of an effective theory approach (valid for sterile masses above the GeV, but below the electroweak scale, Λ EW ).…”

Section: Jhep02(2016)083mentioning

confidence: 99%

Impact of sterile neutrinos on nuclear-assisted cLFV processes

Abada

Romeri

Teixeira

2016

J. High Energ. Phys.

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We discuss charged lepton flavour violating processes occurring in the presence of muonic atoms, such as muon-electron conversion in nuclei CR(µ − e, N), the (Coulomb enhanced) decay of muonic atoms into a pair of electrons BR(µ − e − → e − e − , N), as well as Muonium conversion and decay, Mu − Mu and Mu → e + e − . Any experimental signal of these observables calls for scenarios of physics beyond the Standard Model. In this work, we consider minimal extensions of the Standard Model via the addition of sterile fermions, providing the corresponding complete analytical expressions for all the considered observables. We first consider an "ad hoc" extension with a single sterile fermion state, and investigate its impact on the above observables. Two well motivated mechanisms of neutrino mass generation are then considered: the Inverse Seesaw embedded into the Standard Model, and the νMSM. Our study reveals that, depending on their mass range and on the active-sterile mixing angles, sterile neutrinos can give significant contributions to the above mentioned observables, some of them even lying within present and future sensitivity of dedicated cLFV experiments. We complete the analysis by confronting our results to other (direct and indirect) searches for sterile fermions.

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“…[14][15][16]) and future high energy lepton colliders (the Circular Electron Positron Collider, e.g. [17,18], International Linear Collider, e.g. [17,18], and the FCC-ee, e.g.…”

Section: Jhep10(2017)039mentioning

confidence: 99%

“…[17,18], International Linear Collider, e.g. [17,18], and the FCC-ee, e.g. [19]), for an overview and comparison of the different collider possibilities, see, e.g.…”

Section: Jhep10(2017)039mentioning

confidence: 99%

A supersymmetric electroweak scale seesaw model

Chang

Cheung

Ishida

et al. 2017

J. High Energ. Phys.

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In this paper we propose a novel supersymmetric inverse seesaw model which has only one additional Z 6 symmetry. The field content is minimal to get a viable neutrino spectrum at tree-level. Interestingly, the inverse seesaw scale in our model is related to the scale of electroweak symmetry breaking. Due to that origin we are less biased about hierarchies and discuss three different types of the inverse seesaw mechanism with different phenomenologies. We can successfully reproduce neutrino masses and mixing and our model is consistent with current bounds on neutrinoless double beta decay, non-unitarity of the PMNS matrix and charged lepton flavor violation.

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Testing sterile neutrino extensions of the Standard Model at future lepton colliders

Cited by 170 publications

References 71 publications

Global constraints on a heavy neutrino

Global constraints on a heavy neutrino

Impact of sterile neutrinos on nuclear-assisted cLFV processes

A supersymmetric electroweak scale seesaw model

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