Long-Lived Light Mediators from Higgs boson Decay at HL-LHC, FCC-hh and a Proposal of Dedicated LLP Detectors for FCC-hh

Abstract

We study the pair production of the long-lived mediator particles from the decay of the SM Higgs boson and their subsequent decay into standard model particles. We compute the projected sensitivity, both model-independently and with a minimal model, of using the muon spectrometer of the CMS detector at the HL-LHC experiment for ggF, VBF, and Vh production modes of the Higgs boson and various decay modes of the mediator particle, along with dedicated detectors for LLP searches like CODEX-b and MATHUSLA. Subsequently, we study the improvement with the FCC-hh detector at the 100\,TeV collider experiment for such long-lived mediators, again focusing on the muon spectrometer. We propose dedicated LLP detector designs for the 100\,TeV collider experiment, DELIGHT (\textbf{De}tector for \textbf{l}ong-l\textbf{i}ved particles at hi\textbf{gh} energy of 100\,\textbf{T}eV), and study their sensitivities.

75 pages, 47 figures, 6 tables, v2: version published in PRD

References in corpus (19)

• PYTHIA 6.4 Physics and Manual
• LHAPDF6: parton density access in the LHC precision era
• Secluded WIMP Dark Matter
• DARWIN: towards the ultimate dark matter detector
• Search for $A^{\prime }\to {\mu }^{+}{\mu }^{-}$ decays
• Supersymmetric models with minimal flavour violation and their running
• The minimal model of fermionic dark matter
• Search for long-lived particles that decay into final states containing two electrons or two muons in proton-proton collisions at sqrt(s) = 8 TeV
• Fermionic dark matter with pseudo-scalar Yukawa interaction
• Joint CMB and BBN Constraints on Light Dark Sectors with Dark Radiation
• Search for long-lived particles decaying in the CMS endcap muon detectors in proton-proton collisions at $\sqrt{s}=$ 13 TeV
• Testing Higgs portal dark matter via $Z$ fusion at a linear collider
• Triggering on Emerging Jets
• Search for long-lived particles decaying to leptons with large impact parameter in proton-proton collisions at $\sqrt{s}$ = 13 TeV
• Search for low-mass dilepton resonances in Higgs boson decays to four-lepton final states in proton-proton collisions at $\sqrt{s}=$ 13 TeV
• Search for Higgs bosons decaying into new spin-0 or spin-1 particles in four-lepton final states with the ATLAS detector with 139 fb${}^{-1}$ of $pp$ collision data at $\sqrt{s}=13$ TeV
• Search for exotic decays of the Higgs boson into long-lived particles in $pp$ collisions at $\sqrt{s}=13$ TeV using displaced vertices in the ATLAS inner detector
• Search for long-lived particles decaying to $e^{\pm }{\mu }^{\mp }\nu$
• Search for long-lived particles produced in association with a Z boson in proton-proton collisions at $\sqrt{s}$ = 13 TeV

Cited by in corpus (8)

• Energetic long-lived particles in the CMS muon chambers
• Probing a light dark sector at future lepton colliders via invisible decays of the SM-like and dark Higgs bosons
• Boosted displaced decay of right-handed neutrinos at CMS, ATLAS and MATHUSLA
• Discovery potential of a long-lived partner of inelastic dark matter at MATHUSLA in $U(1{)}_{X_3}$ extension of the standard model
• From obstacle to opportunity: uncovering the silver lining of pileup
• Non-Scaling Topological Defects and Gravitational Waves in Higgs Portal
• Proposal for a shared transverse LLP detector for FCC-ee and FCC-hh and a forward LLP detector for FCC-hh
• Long-lived Light Mediators in a Higgs Portal Model at the FCC-ee