Long-lived heavy neutral leptons with a displaced shower signature at CMS

Abstract

We study the LHC discovery potential in the search for heavy neutral leptons (HNL) with a new signature: a displaced shower in the CMS muon detector, giving rise to a large cluster of hits forming a displaced shower. A new Delphes module is used to model the CMS detector response for such displaced decays. We reinterpret a dedicated CMS search for neutral long-lived particles decaying in the CMS muon endcap detectors for the minimal HNL scenario. We demonstrate that this new strategy is particularly sensitive to active-sterile mixings with $\tau$ leptons, due to hadronic $\tau$ decays. HNL masses between $\sim 1-6$ GeV can be accessed for mixings as low as $|V_{\tau N}{|}^2\sim 10^{-7}$, probing unique regions of parameter space in the $\tau$ sector.

arXiv comment16 pages, 3 figures. Minor edits in v2 and extra references; matches version accepted for publication in JHEP

References in corpus (33)

• The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
• An Introduction to PYTHIA 8.2
• DELPHES 3, A modular framework for fast simulation of a generic collider experiment
• MadGraph 5 : Going Beyond
• Oscillating neutrinos and mu --> e, gamma
• Matching matrix elements and shower evolution for top-quark production in hadronic collisions
• 2020 Global reassessment of the neutrino oscillation picture
• Neutrinos and Collider Physics
• Long-Lived Particles at the Energy Frontier: The MATHUSLA Physics Case
• A facility to Search for Hidden Particles (SHiP) at the CERN SPS
• Dynamical Left-Right Symmetry Breaking
• Searching for long-lived particles beyond the Standard Model at the Large Hadron Collider
• Left-Right Symmetry Breaking in NJL Approach
• Heavy Majorana Neutrinos in the Effective Lagrangian Description: Application to Hadron Colliders
• Operators up to Dimension Seven in Standard Model Effective Field Theory Extended with Sterile Neutrinos
• Heavy neutrino searches at the LHC with displaced vertices
• Right-handed neutrino magnetic moments
• Search for heavy neutral leptons in decays of $W$ bosons produced in 13 TeV $pp$ collisions using prompt and displaced signatures with the ATLAS detector
• Heavy Neutral Leptons at FASER
• Fully-Automated Precision Predictions for Heavy Neutrino Production Mechanisms at Hadron Colliders
• Multilepton and Lepton Jet Probes of Sub-Weak-Scale Right-Handed Neutrinos
• Heavy neutral fermions at the high-luminosity LHC
• Heavy Neutrinos in displaced vertex searches at the LHC and HL-LHC
• Displaced vertices as probes of sterile neutrino mixing at the LHC
• Quasi-Dirac neutrinos at the LHC
• General parametrization of Majorana neutrino mass models
• Search for long-lived heavy neutral leptons with displaced vertices in proton-proton collisions at $\sqrt{s}=$ 13 TeV
• Inclusive Displaced Vertex Searches for Heavy Neutral Leptons at the LHC
• Seeking for sterile neutrinos with displaced leptons at the LHC
• Long-lived heavy neutral leptons at the LHC: four-fermion single-$N_R$ operators
• Probing new physics with displaced vertices: muon tracker at CMS
• Sensitivity Reach on the Heavy Neutral Leptons and $\tau$-Neutrino Mixing $|U_{\tau N}{|}^2$ at the HL-LHC
• Review of opportunities for new long-lived particle triggers in Run 3 of the Large Hadron Collider

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• The Type-I Seesaw family
• Probing light sterile neutrinos in left-right symmetric models with displaced vertices and neutrinoless double beta decay
• Leptonic neutral-current probes in a short-distance DUNE-like setup
• Long-lived particle phenomenology in one-loop neutrino mass models with dark matter
• Impact of unitarity violation on sensitivity of the leptonic CP phase at Hyper-Kamiokande and DUNE
• Revisiting lepton flavor violation: $\tau$ and meson decays