Probing Long-lived Particles at Higgs Factories

Abstract

We study displaced vertex signatures of long-lived particles (LLPs) from exotic Higgs decays in the context of a Higgs-portal model and a neutral-naturalness model at the CEPC and FCC-ee. Such two models feature two representative mass ranges for LLPs, which show very different behavior in their decay signatures. The Higgs-portal model contains a very light sub-GeV scalar boson stemming from a singlet scalar field appended to the Standard Model. Such a light scalar LLP decays into a pair of muons or pions, giving rise to a distinctive signature of collimated muon-jet or pion-jet, thanks to the sub-GeV mass. On the other hand, the neutral-naturalness model, e.g., folded supersymmetry, predicts the lightest mirror glueball of mass $O(10)$ GeV, giving rise to long decays with a large transverse impact parameter because of the relatively large mass. Utilizing such distinct characteristics to remove the background, we estimate the sensitivities of searches for light scalar bosons and mirror glueballs at the CEPC and FCC-ee. We find either complementary or stronger coverage compared to the previous results in the similar contexts.

arXiv comment21 pages, 5 figures; v2, light scalar decay width calculation updated; v3, 24 pages, 7 figures, accepted for publication in Physical Review D

References in corpus (30)

• 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
• Search for the Standard Model Higgs Boson at LEP
• HDECAY: a Program for Higgs Boson Decays in the Standard Model and its Supersymmetric Extension
• The glueball spectrum from an anisotropic lattice study
• The Twin Higgs: Natural Electroweak Breaking from Mirror Symmetry
• Physics Beyond Colliders at CERN: Beyond the Standard Model Working Group Report
• Search for invisible decays of a Higgs boson produced through vector boson fusion in proton-proton collisions at $\sqrt{s}=$ 13 TeV
• Folded Supersymmetry and the LEP Paradox
• Decay and Detection of a Light Scalar Boson Mixing with the Higgs
• HDECAY: Twenty++ Years After
• Phenomenology of a very light scalar (100 MeV $<m_h<$ 10 GeV) mixing with the SM Higgs
• Search for hidden-sector bosons in $B^0\to K^{\ast 0}{\mu }^{+}{\mu }^{-}$ decays
• A Quirky Little Higgs Model
• Search for long-lived scalar particles in $B^{+}\to K^{+}\chi ({\mu }^{+}{\mu }^{-})$ decays
• Discovering Uncolored Naturalness in Exotic Higgs Decays
• Pure-glue hidden valleys through the Higgs portal
• Triggers for displaced decays of long-lived neutral particles in the ATLAS detector
• Search for long-lived neutral particles in $pp$ collisions at $\sqrt{s}$ = 13 TeV that decay into displaced hadronic jets in the ATLAS calorimeter
• The Hyperbolic Higgs
• Search for long-lived particles decaying into displaced jets in proton-proton collisions at $\sqrt{s}=$ 13 TeV
• Search for long-lived particles in final states with displaced dimuon vertices in $pp$ collisions at $\sqrt{s}=$ 13 TeV with the ATLAS detector
• Light Fermionic WIMP Dark Matter with Light Scalar Mediator
• Singlet Scalar Top Partners from Accidental Supersymmetry
• Search for displaced vertices of oppositely charged leptons from decays of long-lived particles in $pp$ collisions at $\sqrt{s}$ = 13 TeV with the ATLAS detector
• Heavy Higgs of the Twin Higgs Models
• Long Live the Higgs Factory: Higgs Decays to Long-Lived Particles at Future Lepton Colliders
• Detecting multimuon jets from the Higgs exotic decays in the Higgs portal framework
• Identifying Exclusive Displaced Hadronic Signatures in the Forward Region of the LHC
• The Higgs boson and the International Linear Collider

Cited by in corpus (13)

• Physics with Far Detectors at Future Lepton Colliders
• Enhancing Sensitivities to Long-lived Particles with High Granularity Calorimeters at the LHC
• Searching for Elusive Dark Sectors with Terrestrial and Celestial Observations
• Resurrecting the Fraternal Twin WIMP Miracle
• Near or Far Detectors? Optimizing Long-Lived Particle Searches at Electron-Positron Colliders
• One-loop radiative corrections to $e^{+}{e}^{-}\to Z{h}^0/H^0{A}^0$ in the Inert Higgs Doublet Model
• New Physics Search at the CEPC: a General Perspective
• Time-delayed electrons from neutral currents at the LHC
• Long-lived Searches of Vector-like Lepton and Its Accompanying Scalar at Colliders
• Exotic Higgs decays into displaced jets at the LHeC
• H Marks the Spot: Searching for Exotic Production of Higgs + X to Map Out New Physics
• Long-Lived Particles at Future Colliders
• Long-lived Light Mediators in a Higgs Portal Model at the FCC-ee