Long-lived Heavy Neutrinos from Higgs Decays

Abstract

We investigate the pair-production of right-handed neutrinos via the Standard Model (SM) Higgs boson in a gauged $B-L$ model. The right-handed neutrinos with a mass of few tens of GeV generating viable light neutrino masses via the seesaw mechanism naturally exhibit displaced vertices and distinctive signatures at the LHC and proposed lepton colliders. The production rate of the right-handed neutrinos depends on the mixing between the SM Higgs and the exotic Higgs associated with the $B-L$ breaking, whereas their decay length depends on the active-sterile neutrino mixing. We focus on the displaced leptonic final states arising from such a process, and analyze the sensitivity reach of the LHC and proposed lepton colliders in probing the active-sterile neutrino mixing. We show that mixing to muons as small as $V_{\mu N}\approx 10^{-7}$ can be probed at the LHC with 100 fb${}^{-1}$ and at proposed lepton colliders with 5000 fb${}^{-1}$. The future high luminosity run at LHC and the proposed MATHUSLA detector may further improve this reach by an order of magnitude.

23 pages, 9 figures, matches published version

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• Long-lived TeV-scale right-handed neutrino production at the LHC in gauged $U(1{)}_X$ model
• Probing right handed neutrinos at the LHeC and lepton colliders using fat jet signatures
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• LHC Constraints on a $B-L$ Gauge Model using Contur
• Heavy neutral leptons at ANUBIS
• Displaced heavy neutrinos from $Z^{\prime }$ decays at the LHC
• Inclusive Displaced Vertex Searches for Heavy Neutral Leptons at the LHC
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• Measurements of differential cross-sections in four-lepton events in 13 TeV proton-proton collisions with the ATLAS detector
• Jet Substructure from Dark Sector Showers
• Testing leptogenesis at the LHC and future muon colliders: a $Z^{\prime }$ scenario
• Collider Searches for Heavy Neutral Leptons: beyond simplified scenarios
• Fat Jet Signature of a Heavy Neutrino at Lepton Collider
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• Searching for Heavy Leptophilic $Z^{\prime }$: from Lepton Colliders to Gravitational Waves
• Heavy Neutrinos at the FCC-hh in the $U(1{)}_{B-L}$ Model
• Probing New Physics with Long-Range Neutrino Interactions: An Effective Field Theory Approach
• Probing active-sterile neutrino transition magnetic moments at LEP and CEPC
• Top-philic Dark Matter in a Hybrid KSVZ axion framework
• Testing the seesaw mechanisms via displaced right-handed neutrinos from a light scalar at the HL-LHC
• Probing the Nature of Neutrinos with a New Force
• Enhanced long-lived dark photon signals at lifetime frontier detectors
• Time-Delayed Electrons from Higgs Decays to Right-Handed Neutrinos
• Long-lived heavy particles in neutrino mass models
• New Physics Search at the CEPC: a General Perspective
• Testing Neutrino Dipole Portal by Long-lived Particle Detectors at the LHC
• Relativistic Freeze-in with Scalar Dark Matter in a Gauged $B-L$ Model and Electroweak Symmetry Breaking
• Heavy Neutrino Searches via Same-sign Lepton Pairs at the Higgs Factory
• BSM constraints from model-independent measurements: A Contur Update
• Probing baryon asymmetry of the Universe at LHC and SHiP
• Deep learning techniques for Imaging Air Cherenkov Telescopes
• Shedding light on the electroweak phase transition from exotic Higgs boson decays at the lifetime frontiers
• Low Scale Seesaw with Local Lepton Number
• Potential for probing three-body decays of Long-Lived Particles with MATHUSLA
• Boosted displaced decay of right-handed neutrinos at CMS, ATLAS and MATHUSLA
• How to measure the spin of invisible states in $e^{+}{e}^{-}\to \gamma +X$
• Improving heavy Dirac neutrino prospects at future hadron colliders using machine learning
• Heavy Neutral Leptons and displaced vertices at LHC
• Charged Lepton Flavor Violation at the High-Energy Colliders: Neutrino Mass Relevant Particles
• Discovery potential of a long-lived partner of inelastic dark matter at MATHUSLA in $U(1{)}_{X_3}$ extension of the standard model
• Generalized angular-order parton showers in Herwig 7
• The Forward Physics Facility at the High-Luminosity LHC
• Fermion masses and mixings in a $U(1{)}_X$ model based on the $\Sigma (18)$ discrete symmetry
• $\mathbf{B}-\mathbf{L}$ model with ${\mathbf{D}}_4\times {\mathbf{Z}}_4\times {\mathbf{Z}}_2$ symmetry for fermion mass hierarchies and mixings
• Associated Higgs boson production with $Z$ boson in the minimal $U(1{)}_X$ extended Standard Model
• Displaced fat-jets and tracks to probe boosted right-handed neutrinos in the $U(1{)}_{B-L}$ model