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Displaced heavy neutrinos from $Z'$ decays at the LHC

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arxiv 1908.09838 v2 pith:FE6AOFXC submitted 2019-08-26 hep-ph hep-ex

Cheng-Wei Chiang , Giovanna Cottin , Arindam Das , Sanjoy Mandal This is my paper · ORCID
classification hep-phhep-ex
keywords displacedheavyneutrinofocusjetslong-livedmodelsvertex
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abstract

We study the LHC sensitivity to probe a long-lived heavy neutrino $N$ in the context of $Z'$ models. We focus on displaced vertex signatures of $N$ when pair produced via a $Z'$, decaying to leptons and jets inside the inner trackers of the LHC experiments. We explore the LHC reach with current long-lived particle search strategies for either one or two displaced vertices in association with hadronic tracks or jets. We focus on two well-motivated models, namely, the minimal $U(1)_{B-L}$ scenario and its $U(1)_{X}$ extension. We find that searches for at least one displaced vertex can cover a significant portion of the parameter space, with light-heavy neutrino mixings as low as $|V_{lN}|^2\approx 10^{-17}$, and $l=e,\mu$ accessible across GeV scale heavy neutrino masses.

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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. Heavy neutral leptons and top quarks in effective field theory

    hep-ph 2025-01 conditional novelty 6.0 of 10

    Long-lived heavy neutral leptons produced via top-quark effective operators could be probed at the HL-LHC up to new-physics scales around 12 TeV at ATLAS and 4.5 TeV at MATHUSLA or ANUBIS.

  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. Right-handed neutrino production through first-generation leptoquarks

    hep-ph 2024-12 conditional novelty 5.0 of 10

    At the HL-LHC, first-generation leptoquarks decaying to right-handed neutrinos are discovered most efficiently through indirect t-channel production, reaching leptoquark masses of roughly 3 to 10 TeV when the new coup...

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