Detecting Hidden Particles with MATHUSLA

Abstract

A hidden sector containing light long-lived particles provides a well-motivated place to find new physics. The recently proposed MATHUSLA experiment has the potential to be extremely sensitive to light particles originating from rare meson decays in the very long lifetime region. In this work, we illustrate this strength with the specific example of a light scalar mixed with the standard model-like Higgs boson, a model where MATHUSLA can further probe unexplored parameter space from exotic Higgs decays. Design augmentations should be considered in order to maximize the ability of MATHUSLA to discover very light hidden sector particles.

5 pages, 4 figures; References added, minor changes

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Cited by in corpus (42)

• Long-Lived Particles at the Energy Frontier: The MATHUSLA Physics Case
• FASER's Physics Reach for Long-Lived Particles
• Searching for long-lived particles beyond the Standard Model at the Large Hadron Collider
• 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
• The Forward Physics Facility: Sites, Experiments, and Physics Potential
• Collider Searches for Long-Lived Particles Beyond the Standard Model
• Higgs boson potential at colliders: status and perspectives
• Dark Higgs Bosons at FASER
• Heavy neutral fermions at the high-luminosity LHC
• Looking for the WIMP Next Door
• Expression of Interest for the CODEX-b Detector
• Direct detection and complementary constraints for sub-GeV dark matter
• Probing dark sectors with long-lived particles at BELLE II
• Leveraging the ALICE/L3 cavern for long-lived exotics
• Probing the Relaxed Relaxion at the Luminosity and Precision Frontiers
• 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
• Dark Scalars and Heavy Neutral Leptons at DarkQuest
• Relaxion and light (pseudo)scalars at the HL-LHC and lepton colliders
• Crunching Dilaton, Hidden Naturalness
• The Weak Scale as a Trigger
• Searches for new physics at SND@LHC
• Pseudo Nambu-Goldstone Dark Matter: Examples of Vanishing Direct Detection Cross Section
• On the Flavour Structure of Anomaly-free Hidden Photon Models
• Hadronic decays of a light Higgs-like scalar
• Higgs portal to dark matter and $B\to K^{(\ast )}$ decays
• Hunting Inflaton at FASER
• Light Scalars at FASER
• How dark is the ${\nu }_R$-philic dark photon?
• Spotting hidden sectors with Higgs binoculars
• Strong constraints on non-standard neutrino interactions: LHC vs. IceCube
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• Sensitivity of the FACET experiment to Heavy Neutral Leptons and Dark Scalars
• The Stochastic Relaxion
• Potential for probing three-body decays of Long-Lived Particles with MATHUSLA
• LHC experiments for long-lived particles of the dark sector
• Leptogenesis Constraints on $B-L$ breaking Higgs Boson in TeV Scale Seesaw Models
• Discovery potential of a long-lived partner of inelastic dark matter at MATHUSLA in $U(1{)}_{X_3}$ extension of the standard model
• The Forward Physics Facility at the High-Luminosity LHC
• Probing the muon $g-2$ with future beam dump experiments