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Probing the Type I Seesaw Mechanism with Displaced Vertices at the LHC

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arxiv 1505.05880 v2 pith:A24CBY42 submitted 2015-05-21 hep-ph

Alberto M. Gago , Pilar Hernández , Joel Jones-Pérez , Marta Losada , Alexander Moreno Briceño This is my paper · ORCID
classification hep-ph
keywords decaysdisplacedregionseesawtypeverticesassociatedconventional
verification ladder T0 review T1 audit T2 compute T3 formal
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abstract

The observation of Higgs decays into heavy neutrinos would be strong evidence for new physics associated to neutrino masses. In this work we propose a search for such decays within the Type I seesaw model in the few-GeV mass range via displaced vertices. Using 300 fb$^{-1}$ of integrated luminosity, at 13 TeV, we explore the region of parameter space where such decays are measurable. We show that, after imposing pseudorapidity cuts, there still exists a region where the number of events is larger than $\mathcal{O}(10)$. We also find that conventional triggers can greatly limit the sensitivity of our signal, so we display several relevant kinematical distributions which might aid in the optimization of a dedicated trigger selection.

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Cited by 3 Pith papers

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

  1. Revealing Neutrino Mass Ordering at CEPC and FCC-ee

    hep-ph 2026-01 conditional novelty 6.0 of 10

    In the minimal two-HNL seesaw, heavy neutral lepton flavor mixings encode the normal vs inverted neutrino mass ordering, and CEPC/FCC-ee could distinguish them for total mixing U_tot^2 ≳ 10^-6.

  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. 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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