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Mass Reconstruction of Heavy Neutral Leptons from Stopped Mesons

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arxiv 2409.04394 v2 pith:X2QY57TK submitted 2024-09-06 hep-ph hep-ex

Gustavo F. S. Alves , P. S. Bhupal Dev , Kevin J. Kelly , Pedro A. N. Machado This is my paper · ORCID
classification hep-phhep-ex
keywords massdecaysdetectorleptonsneutrinoreconstructionabsorberdetectors
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Heavy neutral leptons (HNLs), depending on their mass and mixing, can be efficiently produced in meson decays from the target or absorber in short- to medium-baseline accelerator neutrino experiments, leaving detectable signals through their decays inside the neutrino detectors. We show that the currently running ICARUS experiment at Fermilab can reconstruct the HNL mass and explore new HNL parameter space in the mass range of 70-190 MeV. The mass reconstruction is enabled by two ingredients: (i) simple two-body kinematics of HNL production from stopped kaon decays at the NuMI absorber, followed by HNL decay into a charged-lepton pair and neutrino at the detector, and (ii) high resolution of Liquid Argon Time Projection Chamber (LArTPC) detectors in reconstructing final state particles. Our mass reconstruction method is robust under realistic energy resolution and angular smearing of the charged leptons, and is applicable to any LArTPC detector. We also discuss the synergy between ICARUS and future facilities like DUNE near detector and PIP-II beam dump in probing the HNL parameter space.

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Cited by 2 Pith papers

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

  1. Muon Bremsstrahlung as a New Probe of Dark Sector at Neutrino Experiments

    hep-ph 2026-07 conditional novelty 7.0 of 10

    Muon bremsstrahlung from the focused muon beam at neutrino facilities can produce heavy neutral leptons up to ~1 GeV, opening new search territory for SBND and DUNE Near Detector.

  2. Probing Solar Heavy Neutrinos with Heliospheric Electrons

    astro-ph.HE 2024-12 conditional novelty 6.0 of 10

    Using Ulysses and SOHO MeV electron data, the authors set the strongest direct upper bound U_e^2 ~ 10^-6 on solar-produced heavy neutral leptons, reaching that value at a mass near 10 MeV.

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