Mirror dark matter admixture via mutual mean-field shifts softens the nuclear EOS, raises central densities, lowers maximum masses, and moves the direct Urca onset to higher or lower masses depending on symmetry-energy stiffness.
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Dark Matter Search Results from 1.54 Tonne·Year Exposure of PandaX-4T
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abstract
In this letter, we report the dark matter search results from the commissioning run and the first science run of the PandaX-4T experiment. A blind analysis is carried out on the entire data set. The data processing is improved compared to previous work, unifying the low-level signal reconstruction in a wide energy range up to 120 keV. With a total exposure of 1.54 tonne$\cdot$year, no significant excess of nuclear recoil events is found. The lowest 90% confidence level exclusion on the spin-independent cross section is $1.6 \times 10^{-47}\,\mathrm{cm}^2$ at a dark matter mass of 40 GeV$/c^2$. Our results represent the most stringent constraint for a dark matter mass above 100 GeV$/c^2$.
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representative citing papers
Proposes heavy-element paleodetectors in lead-rich ancient minerals to detect inelastic Higgsino dark matter up to mass splittings of ~920 keV, relaxing radiopurity and depth constraints.
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PandaX-4T reports the first direct spectral search for scalar-mediated neutrino self-interactions in 136Xe double beta decay, setting new upper limits for mediator masses below 2 MeV/c².
A hermetically sealed xenon heat pump demonstrator provides 118 W cooling and 121 W heating at 386 W electrical input, sufficient for 3.1 kg/h xenon purification flow and far below the 6 kW of existing helium-based systems.
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A scalar-mediated inelastic dark matter model with 100 eV splitting, Z2 symmetry forbidding elastic scattering, and a dimension-5 dipole operator reconciles dwarf galaxy observations with cosmological bounds via resonant enhancement and provides a distinct direct detection signal.
A framework unifies dark matter stability and proton decay via residual Z4 symmetry from U(1)B+L breaking, with one-loop proton decay mediated by TeV-scale dark sector particles whose masses correlate with proton lifetime.
LZ reports a null result from 4.2 tonne-year exposure and sets new world-leading upper limits on spin-independent WIMP-nucleon cross sections reaching 2.2e-48 cm2 at 40 GeV.
Dirac right-handed neutrinos in a U(1)_{B-L} Z' portal model produce observable ΔN_eff that, together with direct/indirect detection and collider bounds, carves out testable WIMP and FIMP dark-matter regions.
LHC mono-W/Z searches with a new channel-separation method can exclude large ranges of neutral and charged mass splittings in the 70-75 GeV IDM dark matter scenario that fits astrophysical excesses.
Ultrarelativistically decoupling dark matter in Z' portal models has direct detection cross sections that existing experiments like LZ and XENONnT have already excluded over large regions, leaving testable space above the neutrino fog for 0.4 GeV to 1 TeV masses.
Bilayer graphene enables sub-MeV dark matter detection via electronic excitations with small exposure and sidereal modulation signatures.
AURORA, a distributed DAQ framework for PandaX-xT, uses timed buffers and deferred sorting to reach 1.4 GB/s in a 58-hour prototype run and is projected to sustain over 3 GB/s on its aggregation node.
Classically conformal SU(2)_X model with triplet dark scalar yields viable WIMP and supercooled DM parameter spaces whose production histories are set by the model's first-order phase transition, with gravitational waves as a common probe.
In a dark-photon-mediated Dirac fermionic DM model, only narrow resonant regions with small dark-sector coupling allow the candidate to saturate the full relic density while evading current direct and indirect detection bounds.
PandaX-4T Run 2 data yields solar pp neutrino flux of (8.5 ± 3.5)×10^{10} cm^{-2}s^{-1} at 2.2σ, first positive indication below 165 keV electronic recoil.
In ADD models with n large extra dimensions, gravity-mediated DM-nucleon interactions scale as m_p m_χ M_*^{-4} and resonant annihilation as ⟨σv⟩ ~ m_χ^n M_*^{-n-2}, yielding bounds on {m_χ, M_*} from Xe direct detection and galactic gamma rays.
Simulations of solar CEvNS events produce annually varying ring-like 3D recoil distributions in directional detectors that lack target dependence and contrast with fixed WIMP signals.
Only the hypercharge-zero fermionic electroweak triplet dark matter survives current relic density, direct detection, and indirect detection constraints among the minimal triplet extensions considered.
Future dark matter detectors with ~3000 ton-yr exposure could probe sterile neutrino mixing with νμ and ντ in parameter space not reached by long-baseline or atmospheric searches.
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Probing scalar-neutrino and scalar-dark-matter interactions with PandaX-4T
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Proof-of-concept of a xenon-based cryogenic heat pump demonstrator for future liquid xenon observatories
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Scalar-Mediated Inelastic Dark Matter as a Solution to Small-Scale Structure Anomalies
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Dark Matter Induced Proton Decays
A framework unifies dark matter stability and proton decay via residual Z4 symmetry from U(1)B+L breaking, with one-loop proton decay mediated by TeV-scale dark sector particles whose masses correlate with proton lifetime.
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Dark Matter Search Results from 4.2 Tonne-Years of Exposure of the LUX-ZEPLIN (LZ) Experiment
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$Z^\prime$ Portal Dark Matter with Observable $\Delta N_{\rm eff}$
Dirac right-handed neutrinos in a U(1)_{B-L} Z' portal model produce observable ΔN_eff that, together with direct/indirect detection and collider bounds, carves out testable WIMP and FIMP dark-matter regions.
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LHC Mono-$W/Z$ Signatures as a Probe for Dark Matter Explanations of Astrophysical Excesses
LHC mono-W/Z searches with a new channel-separation method can exclude large ranges of neutral and charged mass splittings in the 70-75 GeV IDM dark matter scenario that fits astrophysical excesses.
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Searching for UFOs from the early universe: direct detection prospects for relativistically decoupling dark matter
Ultrarelativistically decoupling dark matter in Z' portal models has direct detection cross sections that existing experiments like LZ and XENONnT have already excluded over large regions, leaving testable space above the neutrino fog for 0.4 GeV to 1 TeV masses.
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Dive deeper with SUBMARINE: SUB-Mev dArk matter diRect detectIon using bilayer grapheNE
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AURORA: A High Performance Software DAQ Framework for Next-Generation Rare-Event Search Experiments
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Dark matter in classically conformal theories: WIMP and supercooling
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In a dark-photon-mediated Dirac fermionic DM model, only narrow resonant regions with small dark-sector coupling allow the candidate to saturate the full relic density while evading current direct and indirect detection bounds.
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Measurement of solar $pp$ neutrino flux with the new PandaX-4T data
PandaX-4T Run 2 data yields solar pp neutrino flux of (8.5 ± 3.5)×10^{10} cm^{-2}s^{-1} at 2.2σ, first positive indication below 165 keV electronic recoil.
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Signatures of gravity-mediated dark matter interaction in theories with large extra dimensions
In ADD models with n large extra dimensions, gravity-mediated DM-nucleon interactions scale as m_p m_χ M_*^{-4} and resonant annihilation as ⟨σv⟩ ~ m_χ^n M_*^{-n-2}, yielding bounds on {m_χ, M_*} from Xe direct detection and galactic gamma rays.
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Simulations of 3-Dimensional Recoil Response to Coherent Elastic Neutrino-Nucleus Scattering Events in Directional Direct Dark Matter Detectors
Simulations of solar CEvNS events produce annually varying ring-like 3D recoil distributions in directional detectors that lack target dependence and contrast with fixed WIMP signals.
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Twilight of the WIMP: Comprehensive Phenomenology of Electroweak Triplet Dark Matter
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Sterile Neutrino Mixing Parameters from Solar-Neutrino Coherent Scattering
Future dark matter detectors with ~3000 ton-yr exposure could probe sterile neutrino mixing with νμ and ντ in parameter space not reached by long-baseline or atmospheric searches.
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Singlet-doublet dark matter induced radiative neutrino mass and TeV scale leptogenesis
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