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Inclusive Displaced Vertex Searches for Heavy Neutral Leptons at the LHC

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arxiv 1807.10024 v2 pith:QREPZYNP submitted 2018-07-26 hep-ph

Asmaa Abada , Nicolás Bernal , Marta Losada , Xabier Marcano This is my paper · ORCID
classification hep-ph
keywords neutralleptonsheavydisplacedinclusivemodelparticlestandard
verification ladder T0 review T1 audit T2 compute T3 formal
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The inclusion of heavy neutral leptons to the Standard Model particle content could provide solutions to many open questions in particle physics and cosmology. The modification of the charged and neutral currents from active-sterile mixing of neutral leptons can provide novel signatures in Standard Model processes. We revisit the displaced vertex signature that could occur in collisions at the LHC via the decay of heavy neutral leptons with masses of a few GeV emphasizing the implications of flavor, kinematics, inclusive production and number of these extra neutral fermions. We study in particular the implication on the parameter space sensitivity when all mixings to active flavors are taken into account. We also discuss alternative cases where the new particles are produced in a boosted regime.

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Cited by 4 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Neutrino t-channels at Colliders: When Light Neutrinos Matter

    hep-ph 2026-07 conditional novelty 6.0 of 10

    The same-sign WW→ℓℓ t-channel signal for heavy Majorana neutrinos is cancelled by light-neutrino contributions in the seesaw model; the opposite-sign eµjj channel is a better probe.

  2. Simulations of the Sterile Neutrino Oscillations with a Crossing-Width Term

    hep-ph 2024-12 conditional novelty 6.0 of 10

    A two-step diagonalization plus a dummy-particle trick lets standard event generators simulate GeV-scale sterile neutrino oscillations with crossing-width terms, and a QFT derivation gives displaced-vertex distances.

  3. Probing electroweak pair production of heavy neutral leptons with displaced vertices at the LHC

    hep-ph 2025-12 conditional novelty 5.0 of 10

    LHC displaced-vertex data can exclude sterile neutrinos with masses 20-230 GeV and mixings down to 4e-14 when they are produced in pairs from higgsino decays.

  4. Heavy Neutral Leptons without Prejudice

    hep-ph 2024-12 conditional novelty 5.0 of 10

    HL-LHC and FCC-ee can probe HNL Yukawa couplings down to y^2 near 10^-4 to 10^-6 depending on mass; at zero mixing, Higgs width precision is the strongest constraint and the two colliders have comparable reach.

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