Review on Higgs Hidden–Dark Sector Physics at High-Energy Colliders

Lagouri, T.

doi:10.3390/sym14071299

Cited by 3 publications

(2 citation statements)

References 42 publications

(92 reference statements)

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“…An understanding of the universe at the most fundamental level has long been an aim of the physics community. The Standard Model stands as the most complete fundamental description of matter and its interactions, yet many phenomena, including the matter-antimatter asymmetry, gravitational interaction, and the neutrino mass [1], are not well-described within the current framework. This has prompted widespread efforts to search for physics beyond the Standard Model (BSM), which would simultaneously show an inconsistency with the current Standard Model picture while also potentially giving credence to one of many proposed theoretical alternatives [2].…”

Section: Introductionmentioning

confidence: 99%

The St. Benedict Facility: Probing Fundamental Symmetries through Mixed Mirror β-Decays

Porter,

Bardayan,

Brodeur

et al. 2023

Atoms

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Precise measurements of nuclear beta decays provide a unique insight into the Standard Model due to their connection to the electroweak interaction. These decays help constrain the unitarity or non-unitarity of the Cabibbo–Kobayashi–Maskawa (CKM) quark mixing matrix, and can uniquely probe the existence of exotic scalar or tensor currents. Of these decays, superallowed mixed mirror transitions have been the least well-studied, in part due to the absence of data on their Fermi to Gamow-Teller mixing ratios (ρ). At the Nuclear Science Laboratory (NSL) at the University of Notre Dame, the Superallowed Transition Beta-Neutrino Decay Ion Coincidence Trap (St. Benedict) is being constructed to determine the ρ for various mirror decays via a measurement of the beta–neutrino angular correlation parameter (aβν) to a relative precision of 0.5%. In this work, we present an overview of the St. Benedict facility and the impact it will have on various Beyond the Standard Model studies, including an expanded sensitivity study of ρ for various mirror nuclei accessible to the facility. A feasibility evaluation is also presented that indicates the measurement goals for many mirror nuclei, which are currently attainable in a week of radioactive beam delivery at the NSL.

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Section: Introductionmentioning

confidence: 99%

The St. Benedict Facility: Probing Fundamental Symmetries through Mixed Mirror β-Decays

Porter,

Bardayan,

Brodeur

et al. 2023

Atoms

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show abstract

“…We need more observational clues for the DM model building [4]. In addition to the cosmological searches [5], there are mainly three types of DM searches: direct detection [6][7][8], indirect detection [9][10][11], and collider search [12][13][14][15], to constrain the couplings between the DM and SM particles [4,16,17]. Most of them are given on the DM coupling with nucleons and hence effectively quarks.…”

Section: Introductionmentioning

confidence: 99%

Associated production of neutrino and dark fermion at future lepton colliders

Ge,

Ma,

et al. 2023

J. High Energ. Phys.

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Fermionic dark matter can be pairly produced and hence searched with missing energy at colliders. We extend such probe to the associated production of a neutrino and a dark sector fermion at the future e+e− colliders such as CEPC, FCC-ee, ILC, and CLIC. Two typical processes, the mono-photon and electron-positron pair productions associated with missing energy, can serve the purpose. While the mono-photon search prevails at CEPC, FCC-ee, and ILC, the "Image missing" channel has more significant contributions at CLIC with much higher collision energy $$ \sqrt{s} $$ s . The beam polarizations can help further suppressing the SM backgrounds to enhance the signal significance while differential cross sections can distinguish the Lorentz structure of various effective operators. The combined sensitivity can reach well above 1 TeV at CEPC/FCC-ee and ILC while it further touches 30 TeV at CLIC. Comparing with the updated results from the direct detection experiments (XENON1T, PandaX-II, PandaX-4T, LZ, and XENONnT), astrophysical X/γ-ray observations, and cosmological constraints for the sub-MeV absorption dark matter, the collider searches are actually more sensitive and hence can provide a complementary approach to addressing the dark fermions.

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Searching for a new light gauge boson with axial couplings in muon beam dump experiments

Fayet,

Olea-Romacho

2024

J. High Energ. Phys.

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We present a formalism for new U(1) interactions involving weak hypercharge, baryon, and lepton numbers, and a possible axial symmetry generator FA in the presence of a second Brout-Englert-Higgs doublet. The resulting U boson, after mixing with the Z, interpolates between a generalised dark photon, a dark Z, and an axially coupled gauge boson. We especially focus on the axial couplings originating from FA or from mixing with the Z, determined by the scalar sector via parameters like tan β and the v.e.v. of an extra dark singlet.We explore the distinctive features of axially coupled interactions, especially in the ultrarelativistic limit, where the U boson behaves much as an axion-like particle, with enhanced interactions to quarks and leptons. This enhancement is particularly relevant for future muon beam dump experiments, since the muon mass considerably increases the effective coupling, proportional to 2mμ/mU, compared to analogous experiments with electrons.We also analyse the shape of the expected beam dump exclusion or discovery regions, influenced by U boson interactions and the experiment geometry. Different situations are considered, limited in particular by cases for which the U decays before reaching the detector, or has too small couplings to produce detectable events. We also compare to vectorially coupled bosons and axion-like pseudoscalars, highlighting the importance of understanding the parameter space for future experiment design and optimisation.

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Review on Higgs Hidden–Dark Sector Physics at High-Energy Colliders

Cited by 3 publications

References 42 publications

The St. Benedict Facility: Probing Fundamental Symmetries through Mixed Mirror β-Decays

The St. Benedict Facility: Probing Fundamental Symmetries through Mixed Mirror β-Decays

Associated production of neutrino and dark fermion at future lepton colliders

Searching for a new light gauge boson with axial couplings in muon beam dump experiments

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