Dark Higgs Bosons at FASER

Abstract

FASER, ForwArd Search ExpeRiment at the LHC, has been proposed as a small, very far forward detector to discover new, light, weakly-coupled particles. Previous work showed that with a total volume of just $\sim 0.1-1{\mathrm{m}}^3$, FASER can discover dark photons in a large swath of currently unconstrained parameter space, extending the discovery reach of the LHC program. Here we explore FASER's discovery prospects for dark Higgs bosons. These scalar particles are an interesting foil for dark photons, as they probe a different renormalizable portal interaction and are produced dominantly through $B$ and $K$ meson decays, rather than pion decays, leading to less collimated signals. Nevertheless, we find that FASER is also a highly sensitive probe of dark Higgs bosons with significant discovery prospects that are comparable to, and complementary to, much larger proposed experiments.

22 pages, 7 figures. V.2: added discussion

References in corpus (13)

• Observation of a new particle in the search for the Standard Model Higgs boson with the ATLAS detector at the LHC
• Observation of a new boson at a mass of 125 GeV with the CMS experiment at the LHC
• Results from a search for dark matter in the complete LUX exposure
• Dark Matter Results From 54-Ton-Day Exposure of PandaX-II Experiment
• The WIMPless Miracle: Dark Matter Particles without Weak-scale Masses or Weak Interactions
• Higgs-field Portal into Hidden Sectors
• Searches for invisible decays of the Higgs boson in pp collisions at sqrt(s) = 7, 8, and 13 TeV
• US Cosmic Visions: New Ideas in Dark Matter 2017: Community Report
• New strategies for New Physics search in B -> K* nu anti-nu, B -> K nu anti-nu and B -> X(s) nu anti-nu decays
• Search for an invisibly decaying Higgs boson or dark matter candidates produced in association with a $Z$ boson in $pp$ collisions at $\sqrt{s}=$ 13 TeV with the ATLAS detector
• Detecting Hidden Particles with MATHUSLA
• Constraining Light Bosons with Radiative ${\rm Y}(1S)$ Decays
• Low Scale Inflation at High Energy Colliders and Meson Factories

Cited by in corpus (80)

• Physics Beyond Colliders at CERN: Beyond the Standard Model Working Group Report
• Long-Lived Particles at the Energy Frontier: The MATHUSLA Physics Case
• FASER's Physics Reach for Long-Lived Particles
• Phenomenology of GeV-scale Heavy Neutral Leptons
• Decay and Detection of a Light Scalar Boson Mixing with the Higgs
• Dark Sectors at the Fermilab SeaQuest Experiment
• Recent Progress in the Physics of Axions and Axion-Like Particles
• The Forward Physics Facility: Sites, Experiments, and Physics Potential
• Detecting and Studying High-Energy Collider Neutrinos with FASER at the LHC
• Heavy Neutral Leptons at FASER
• Inelastic Dark Matter at the LHC Lifetime Frontier: ATLAS, CMS, LHCb, CODEX-b, FASER, and MATHUSLA
• ALPs at FASER: The LHC as a Photon Beam Dump
• Heavy neutral fermions at the high-luminosity LHC
• Flavor-specific scalar mediators
• Expression of Interest for the CODEX-b Detector
• Forward Neutrino Fluxes at the LHC
• Explaining $(g-2{)}_{\mu ,e}$, the KOTO anomaly and the MiniBooNE excess in an extended Higgs model with sterile neutrinos
• Technical Proposal for FASER: ForwArd Search ExpeRiment at the LHC
• FORESEE: FORward Experiment SEnsitivity Estimator for the LHC and future hadron colliders
• Probing dark sectors with long-lived particles at BELLE II
• Leveraging the ALICE/L3 cavern for long-lived exotics
• Producing a new Fermion in Coherent Elastic Neutrino-Nucleus Scattering: from Neutrino Mass to Dark Matter
• Detecting Dark Matter with Far-Forward Emulsion and Liquid Argon Detectors at the LHC
• FORMOSA: Looking Forward to Millicharged Dark Sectors
• FACET: A new long-lived particle detector in the very forward region of the CMS experiment
• R-parity Violation and Light Neutralinos at CODEX-b, FASER, and MATHUSLA
• Extending the reach of FASER, MATHUSLA, and SHiP towards smaller lifetimes using secondary particle production
• Probing the Higgs Portal at the Fermilab Short-Baseline Neutrino Experiments
• Dark Scalars and Heavy Neutral Leptons at DarkQuest
• Neutral Current Neutrino Interactions at FASER$\nu$
• EFT at FASER$\nu$
• Probing Light Gauge Bosons in Tau Neutrino Experiments
• Constraints on light scalars from PS191 results
• Crunching Dilaton, Hidden Naturalness
• The Weak Scale as a Trigger
• Searches for new physics at SND@LHC
• Dark Higgs Bosons at Colliders
• Probing naturally light singlets with a displaced vertex trigger
• Sensitivities to feebly interacting particles: public and unified calculations
• Forbidden frozen-in dark matter
• Scale Invariant FIMP Miracle
• Signatures of Non-thermal Dark Matter with Kination and Early Matter Domination: Gravitational Waves versus Laboratory Searches
• Light $Z^{\prime }$ and Dark Matter from U(1)${}_X$ Gauge Symmetry
• FLArE up dark sectors with EM form factors at the LHC Forward Physics Facility
• Light Dark Sectors through the Fermion Portal
• Looking forward to test the KOTO anomaly with FASER
• Hadronic decays of a light Higgs-like scalar
• Hunting Inflaton at FASER
• Signatures of dark Higgs boson in light fermionic dark matter scenarios
• ALP Searches at the LHC: FASER as a Light Shining through Walls Experiment
• MATHUSLA: A Detector Proposal to Explore the Lifetime Frontier at the HL-LHC
• Forward Neutrinos from Charm at Large Hadron Collider
• Energetic long-lived particles in the CMS muon chambers
• Probing some photon portals to new physics at intensity frontier experiments
• Enhanced long-lived dark photon signals at lifetime frontier detectors
• Affleck-Dine Cogenesis of Baryon and Dark Matter
• Shedding Flavor on Dark via Freeze-in: $U(1{)}_{B-3L_i}$ Gauged Extensions
• Light $Z^{\prime }$ and Dirac fermion dark matter in the $B-L$ model
• Neutrino Detection without Neutrino Detectors: Discovering Collider Neutrinos at FASER with Electronic Signals Only
• Inelastic Dark Matter from Dark Higgs Boson Decays at FASER
• Searching for exotic B meson decays with the CMS L1 track trigger
• Unravelling the richness of dark sector by FASER$\nu$
• Search for Lepton Flavor Violating Decay at FASER
• Leptoquark search at the Forward Physics Facility
• Higgs Portal From The Atmosphere To Hyper-K
• The Stochastic Relaxion
• Sensitivities on dark photon from the Forward Physics Experiments
• Looking forward to inelastic DM with electromagnetic form factors at FASER and beam dump experiments
• Freeze-in production of sterile neutrino dark matter in a gauged U$(1{)}^{\prime }$ model with inverse seesaw
• Complementarity between Cosmic String Gravitational Waves and long-lived particle searches in a laboratory
• Detecting LHC Neutrinos at Surface Level
• Dark photon pair production via off-shell dark Higgs at FASER
• Right handed neutrino production from $Z^{\prime }$ interactions in forward search experiments
• Measurements and analysis of different front-end configurations for monolithic SiGe BiCMOS pixel detectors for HEP applications
• From obstacle to opportunity: uncovering the silver lining of pileup
• Search for dark Higgs inflaton with curvature couplings at LHC experiments
• The Forward Physics Facility at the High-Luminosity LHC
• Long-lived Light Mediators in a Higgs Portal Model at the FCC-ee
• Electron Beam Dump Constraints on Light Bosons with Lepton Flavor Violating Couplings
• Light scalars in neutron star mergers