Di-decay signature of new physics particles at intensity frontier experiments

Abstract

We present a discovery-era strategy for Intensity Frontier experiments based on ``di-decay'' events, in which feebly interacting particles (FIPs) are produced in pairs and then both decay inside the detector. This signature may exist in broad classes of models with FIPs decaying in the same way as minimal ``portal'' particles. The two displaced vertices may allow reconstruction of the pair invariant mass and hence reveal the production channel, information normally inaccessible at these facilities. This, in turn, lets one discriminate between FIP models that share identical decay signatures. As a case study, we consider the model of Higgs-like scalars and show that SHiP, Belle II, and the Downstream@LHCb can each cover wide domains of viable parameter space using di-decays.

arXiv comment9+20 pages. Matches published version

References in corpus (61)

• Heavy Quark Symmetry
• LHCb Detector Performance
• The $\nu$MSM, Dark Matter and Baryon Asymmetry of the Universe
• A facility to Search for Hidden Particles at the CERN SPS: the SHiP physics case
• The Belle II Physics Book
• Physics Beyond Colliders at CERN: Beyond the Standard Model Working Group Report
• Collider Probes of Axion-Like Particles
• Exotic Decays of the 125 GeV Higgs Boson
• Probing the Standard Model with Higgs signal rates from the Tevatron, the LHC and a future ILC
• Serendipity in dark photon searches
• Probing Light Thermal Dark-Matter With a Higgs Portal Mediator
• A taste of dark matter: Flavour constraints on pseudoscalar mediators
• Phenomenology of GeV-scale Heavy Neutral Leptons
• The Low-Energy Effective Theory of Axions and ALPs
• Flavor probes of axion-like particles
• Light inflaton Hunter's Guide
• Decay and Detection of a Light Scalar Boson Mixing with the Higgs
• Emerging Jets
• The Present and Future Status of Heavy Neutral Leptons
• Review of strongly-coupled composite dark matter models and lattice simulations
• Coupling QCD-scale axion-like particles to gluons
• Inelastic Dark Matter at the LHC Lifetime Frontier: ATLAS, CMS, LHCb, CODEX-b, FASER, and MATHUSLA
• The High-Energy Frontier of the Intensity Frontier: Closing the Dark Photon, Inelastic Dark Matter, and Muon g-2 Windows
• The seesaw portal in testable models of neutrino masses
• Expression of Interest for the CODEX-b Detector
• Heavy neutrino production via $Z^{\prime }$ at the lifetime frontier
• Phenomenology of GeV-scale scalar portal
• Search for a non-standard-model Higgs boson decaying to a pair of new light bosons in four-muon final states
• Broadening the Higgs Boson with Right-Handed Neutrinos and a Higher Dimension Operator at the Electroweak Scale
• Strongly interacting dark sectors in the early Universe and at the LHC through a simplified portal
• Searches for Long-Lived Particles at the Future FCC-ee
• Higgs phenomenology as a probe of sterile neutrinos
• Cosmological beam dump: constraints on dark scalars mixed with the Higgs boson
• Reinterpreting the ATLAS bounds on heavy neutral leptons in a realistic neutrino oscillation model
• A search for decays of the Higgs boson to invisible particles in events with a top-antitop quark pair or a vector boson in proton-proton collisions at $\sqrt{s}$ = 13 TeV
• Dark Higgs Bosons at Colliders
• Spying an invisible Higgs
• Sensitivities to feebly interacting particles: public and unified calculations
• Nuclear modification factors for jet fragmentation
• The see-saw portal at future Higgs Factories
• Hadronic decays of a light Higgs-like scalar
• Sensitivity of the intensity frontier experiments for neutrino and scalar portals: analytic estimates
• Light scalar production from Higgs bosons and FASER 2
• Phenomenology of axion-like particles with universal fermion couplings -- revisited
• The Axion-Higgs Portal
• Search for a long-lived spin-0 mediator in $b\to s$ transitions at the Belle II experiment
• Searches for long-lived dark photons at proton accelerator experiments
• LHCb potential to discover long-lived new physics particles with lifetimes above 100 ps
• Dark showers from Z-dark Z' mixing
• Search for light long-lived neutral particles that decay to collimated pairs of leptons or light hadrons in $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector
• Search for short- and long-lived axion-like particles in $H\to aa\to 4\gamma$ decays with the ATLAS experiment at the LHC
• Advancing the phenomenology of GeV-scale axion-like particles
• Search for the decay of the Higgs boson to a pair of light pseudoscalar bosons in the final state with four bottom quarks in proton-proton collisions at $\sqrt{s}$ = 13 TeV
• Distinguishing Dirac from Majorana Heavy Neutrino at Future Lepton Colliders
• Design of the Global Reconstruction Logic in the Belle II Level-1 Trigger system
• Search for new resonances decaying to pairs of merged diphotons in proton-proton collisions at $\sqrt{s}$ = 13 TeV
• Model-independent search for pair production of new bosons decaying into muons in proton-proton collisions at $\sqrt{s}$ = 13 TeV
• PREFACE: A search for long-lived particles at the Large Hadron Collider
• Sub-GeV dark matter and multi-decay signatures from dark showers at beam-dump experiments
• A Downstream and vertexing algorithm for Long Lived Particles (LLP) selection at the first High-level trigger (HLT1) of LHCb
• Finding excesses in model parameter space