Vector-like leptons: Higgs decays and collider phenomenology
By A. Falkowski, David M. Straub, Avelino Vicente. 2013
178 citations recorded by the source corpus.
A bstractWe study the impact of heavy vector-like leptons on several observables in collider and low-energy physics. These states, present in many well-motivated extensions of the Standard Model, can induce lepton flavour violation and non-standard Higgs decays. We study these effects in a model inspired by the composite Higgs scenario. After deriving bounds on the mass and production cross-section of the vector-like states using recent LHC data on multilepton searches, we discuss the modification of the Higgs decays to dilepton, diphoton and Zγ final states as well as low-energy observables like radiative lepton decays, the anomalous magnetic moment of the muon and the electric dipole moment of the electron. We find several interesting correlations. In particular, we show that branching fractions of lepton flavour-violating Higgs decays at an observable level are prohibited due to the strong bounds on the radiative lepton decays.
Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics
View Paper: https://www.semanticscholar.org/paper/834d3865f0242eb569cc7b6639ffd389a0d26a9b
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In Astronomy and Astrophysics
In Nuclear and High Energy Physics
- Gudrun Heinrich
- Cms Collaboration
- Atlas Collaboration
- Ansgar Denner
- Stefan Kallweit
- Stefan Dittmaier
- M. Grazzini
- Juan Rojo
Citations in the corpus
- Beyond the Standard Model Physics at the HL-LHC and HE-LHC (2018, background): “We further assume that the new leptons mix only with one family of SM leptons in order to simply avoid strong constraints from the experiments searching for lepton flavour violation and we consider the mixing with the second family as an example [509–518] (the discovery potential in the case of mixi”
- The Composite Nambu-Goldstone Higgs (2015, background): “[193, 194], which focus on scenarios characterized by a large tau compositeness.”
- Phenomenology of an SU(2) × SU(2) × U(1) model with lepton-flavour non-universality (2016, background): “We find that the allowed points from the global fit accommodating both RK and R(D(∗)) within 2σ lie within a very restricted region: MZ′ ∈ [500, 1710] GeV , g2 ∈ [1.2, 3.5] , ∆s ∈ [−1.16,−0.97] , ∆b ∈ [0.003, 0.007] , |∆µ| ∈ [0.94, 0.99] , |∆τ | ∈ [0, 0.11] , ζ ∈ [0, 0.02] .”
- Electroweak constraints on flavorful effective theories (2015, background): “In this work we consider three flavor scenarios which address the new physics (NP) flavor puzzle: alignment [21,22], Minimal Flavor Violation (MFV) [23–26] and anarchic partial compositeness or warped extra dimensions [27–33] which is similar to vector-like fermion scenario [34,35].”