Pith. sign in

REVIEW 4 cited by

Heavy neutral leptons in effective field theory and the high-luminosity LHC

Not yet reviewed by Pith; the record is open.

Re-run · record.json Download PDF Read on arXiv ↗

This paper has not been read by Pith yet. Machine review is queued; the pith claim, tier, and objections will appear here once it completes.

SPECIMEN: schema-true, not a live event

T0 review · schema-true

One-sentence machine reading of the paper's core claim.

pith:XXXXXXXX · record.json · timestamp

arxiv 2105.13851 v2 pith:2FTBTBGI submitted 2021-05-28 hep-ph hep-ex

Giovanna Cottin , Juan Carlos Helo , Martin Hirsch , Arsenii Titov , Zeren Simon Wang This is my paper · ORCID
classification hep-phhep-ex
keywords hnlsmassescaseexpectedheavyleptonslong-livedminimal
verification ladder T0 review T1 audit T2 compute T3 formal
0 comments
abstract

Heavy neutral leptons (HNLs) with masses around the electroweak scale are expected to be rather long-lived particles, as a result of the observed smallness of the active neutrino masses. In this work, we study long-lived HNLs in $N_R$SMEFT, a Standard Model (SM) extension with singlet fermions to which we add non-renormalizable operators up to dimension-6. Operators which contain two HNLs can lead to a sizable enhancement of the production cross sections, compared to the minimal case where HNLs are produced only via their mixing with the SM neutrinos. We calculate the expected sensitivities for the ATLAS detector and the future far-detector experiments: AL3X, ANUBIS, CODEX-b, FASER, MATHUSLA, and MoEDAL-MAPP in this setup. The sensitive ranges of the HNL mass and of the active-heavy mixing angle are much larger than those in the minimal case. We study both, Dirac and Majorana, HNLs and discuss how the two cases actually differ phenomenologically, for HNL masses above roughly 100 GeV.

Discussion (0). Continue with ORCID to comment.

Forward citations

Cited by 4 Pith papers

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

  1. Direct constraints on the agnostic $\nu$SMEFT from heavy-neutrino searches at the LHC

    hep-ph 2026-07 conditional novelty 6.0 of 10

    A recast of CMS same-sign-dimuon data places the first direct bounds on the agnostic νSMEFT, excluding couplings below ~5.8×10⁻⁷ GeV⁻² at m_N≈1.5 TeV.

  2. 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.

  3. Low-scale seesaw with flavour and CP symmetries $\unicode{x2013}$ from colliders to leptogenesis

    hep-ph 2024-12 conditional novelty 6.0 of 10

    For four flavour-symmetry cases, this paper maps heavy-neutrino lifetimes, decay flavour ratios, and the parameter space where leptogenesis works and colliders can test it.

  4. 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.

Pith tools