Dark Matter

Xenon-based dark matter detectors, especially DARWIN, could detect neutrinos from MeV-mass dark matter that annihilates to the third neutrino mass eigenstate, with projected sensitivity competitive with Super-Kamiokande.

arxiv:2411.19836 · hep-ph · 2024-11

A conformal freeze-in model with a neutrino portal can produce the observed dark matter abundance and, in part of its parameter space, the neutrino mass scale, while evading X-ray constraints for composite sterile-neutrino dark matter.

arxiv:2412.00181 · hep-ph · 2024-11

Cluster abundance with weak-lensing masses sets the dark matter-dark radiation temperature ratio to ξ_DR < 0.098 at 95% credibility when combined with CMB and BAO data.

arxiv:2411.19911 · astro-ph.CO · 2024-11

Using INTEGRAL x-ray and AMS-02 positron data, the authors set lower limits on dark photon and scalar dark matter decay lifetimes from 10^25 to 10^29 seconds across 1 MeV to 2 TeV masses.

arxiv:2412.00180 · hep-ph · 2024-11

Stacked eROSITA X-ray observations show star-forming galaxies do not have brighter hot circumgalactic emission than quiescent galaxies at matched stellar or halo mass, under the adopted stellar-to-halo mass relation.

arxiv:2411.19945 · astro-ph.GA · 2024-11

No single CAMELS IllustrisTNG simulation reproduces the scaling relations of both early- and late-type galaxies across datasets, and inferred cosmological and feedback parameters vary strongly with the chosen data.

arxiv:2412.00217 · astro-ph.GA · 2024-11

Sub-MeV dark matter scattering, capture, and evaporation remove at most about 1e22 erg/s from the pulsating white dwarf G117-B15A, too little to explain its excess cooling, while Galactic Center white dwarfs could probe cross-sections down to roughly 1.5e-40 cm^2.

arxiv:2412.00470 · astro-ph.HE · 2024-11

Neutrinos diffusing through dense dark matter spikes around supermassive black holes can be delayed by days, but the accompanying flux suppression means dark matter alone probably cannot explain the observed 100+ day delays from tidal disruption events.

arxiv:2412.00805 · hep-ph · 2024-12

Fuzzy dark matter with a particle mass around 10^-23 eV can dynamically heat Nube's stars into the observed extremely diffuse stellar distribution.

arxiv:2412.01307 · astro-ph.GA · 2024-12

Wave dark matter halo fluctuations would stretch lensed FRB signals by about 10^-10, a drift that one year of monitoring lensed repeating bursts could detect.

arxiv:2412.01439 · astro-ph.GA · 2024-12

A 16-lesson GR and cosmology course for Swiss high-school students produced large pre-post gains on an author-designed conceptual test and small affective gains.

arxiv:2412.01551 · physics.ed-ph · 2024-12

This review lays out how gravitationally lensed fast radio bursts could be identified and used to measure the Hubble constant and the compact-object content of dark matter.

arxiv:2412.01536 · astro-ph.HE · 2024-12

Red and blue simulated galaxies can be described by the same field-level effective field theory as halo mocks, but blue galaxies require the dedicated HMQ model rather than LRG-style HOD models.

arxiv:2412.01888 · astro-ph.CO · 2024-12

An anomaly-free two-component secluded WIMP model with a dark photon, dark Higgs, and scotogenic Dirac neutrino masses can account for the observed relic density while evading cosmological bounds.

arxiv:2412.02027 · hep-ph · 2024-12

Galaxy and subhalo mass fractions relative to dark matter decrease towards the centres of matched cosmic voids, with galaxy-to-subhalo ratios limited by the scarcity of massive subhaloes.

arxiv:2608.09086 · astro-ph.CO · 2026-08

Analysis of EPTA pulsar polarimetry finds no evidence for ultra-light axion dark matter, sets upper limits on the axion-photon coupling, and attributes a common 2-year-period signal to ionospheric Faraday rotation.

arxiv:2412.02232 · astro-ph.CO · 2024-12

Dark matter captured in stars can transmute them into low-mass black holes whose mergers would be visible to gravitational-wave detectors, letting non-observation constrain dark matter.

arxiv:2412.02453 · hep-ph · 2024-12

Adding the Milky Way's bar to the gravitational model changes the regular/chaotic status of 17 of 45 central globular cluster orbits.

arxiv:2412.02426 · astro-ph.GA · 2024-12

Using archival HST far-UV spectra, the authors exclude gaγ above 10^-12 GeV^-1 for ALP dark matter masses 14.4-22.2 eV, about one order of magnitude stronger than earlier limits.

arxiv:2412.02543 · hep-ph · 2024-12

A saturating scalar self-interaction lets dark matter halos form Thomas-Fermi solitons, fuzzy solitons, or transitions between them, with even subdominant interactions seeding fuzzy solitons.

arxiv:2412.02519 · astro-ph.CO · 2024-12

A speculative model connects the Kardashev scale to a space exploration distance and suggests that advanced AI civilizations could harvest energy from primordial black holes, with a predicted minimum PBH fraction and an ALMA-detectable submillimeter excess.

arxiv:2412.02671 · astro-ph.GA · 2024-12

A merger-based dynamical model of M31, calibrated to its rotation curve, gives a total mass of 4.5e11 solar masses within 137 kpc and a 68% dark matter fraction.

arxiv:2412.02737 · astro-ph.GA · 2024-12

The redshift distribution of high-SNR weak lensing peaks traces massive haloes and is insensitive to baryonic physics, making it a promising cosmological probe for Stage IV surveys.

arxiv:2412.02736 · astro-ph.CO · 2024-12

This paper constructs two new neutrino-portal dark matter models with s-channel scalar and pseudoscalar mediators and maps how JUNO, Hyper-Kamiokande and CMB-S4 would probe their parameter space.

arxiv:2412.02994 · hep-ph · 2024-12

A benchmark parameter point in the U(1)_{B-L} radiative seesaw model is claimed to satisfy current neutrino, dark matter, and collider constraints.

arxiv:2412.03031 · hep-ph · 2024-12

Simulated minor mergers of gas-rich dwarf disk galaxies with Milky Way-like spirals produce long-lived compact stellar remnants matching transitional cE/UCD galaxies.

arxiv:2412.03100 · astro-ph.GA · 2024-12

Fitting LMC low-frequency radio data with a dark matter plus cosmic-ray double power-law model yields dark-matter flux limits of 98.4 to 114.8 Jy at 1.4 GHz, which translate to annihilation cross-section bounds above the thermal relic value.

arxiv:2412.03163 · astro-ph.HE · 2024-12

A review article that compiles how spin-based quantum sensors search for beyond-Standard-Model spin-dependent interactions, without adding new measurements.

arxiv:2412.03288 · quant-ph · 2024-12

In the Guo et al. semi-analytic model on the Millennium Simulation, most cosmic-web effects on galaxy properties reduce to a halo mass bias plus a satellite and backsplash excess.

arxiv:2412.03438 · astro-ph.CO · 2024-12

For NGC1052-DF44, MOND and RGGR modified gravity fits with free orbital anisotropy match the observed velocity dispersion as well as an NFW dark matter halo.

arxiv:2412.03658 · astro-ph.CO · 2024-12

A future superconducting radio-frequency cavity experiment could detect relativistic millicharged particles by picking up the tiny currents their plasma induces in a nearby shielded cavity.

arxiv:2412.03643 · hep-ph · 2024-12

Lattice simulations show axion and axion-Higgs strings produce gravitational waves too weak for current pulsar timing arrays once dark matter overproduction is taken into account.

arxiv:2412.04218 · hep-ph · 2024-12

In the minimal freeze-in dark photon model, low-temperature reheating pushes the required portal coupling to larger values, and the exact curve depends on the equation of state during reheating, widening the reach of direct detection experiments.

arxiv:2412.04550 · hep-ph · 2024-12

A Poisson-Fisher degeneracy index (β, γ) predicts which endpoint of a rare-event search interval is vulnerable to model misspecification and whether a goodness-of-fit test can detect the distortion.

arxiv:2608.09203 · hep-ex · 2026-08

Dark matter compression can trigger quark cores in unusually light neutron stars while leaving the mass-radius relation unchanged, producing 'masquerading hybrid stars' and, for light strongly interacting dark matter, 'dark oysters' with huge dark matter halos.

arxiv:2412.05207 · hep-ph · 2024-12

Diffusion models conditioned on dark matter density fields generate galaxy density maps that match hydrodynamic simulations better than HOD or CNN baselines in the CAMELS IllustrisTNG suite.

arxiv:2412.05131 · astro-ph.CO · 2024-12

Relativistic bubble walls can pair-produce dark matter much heavier than the phase transition scale, which then free-streams as warm dark matter.

arxiv:2412.05653 · hep-ph · 2024-12

A model-building study showing that a zero lightest neutrino mass can be combined with three right-handed neutrinos and successful low-scale leptogenesis in the scotogenic model.

arxiv:2412.05774 · hep-ph · 2024-12

In the Galacticus semi-analytical model, the most massive CMASS-like red galaxies are the least metal-enriched, assemble later, and their clustering depends on cosmic-web environment, unlike their less massive counterparts.

arxiv:2412.05745 · astro-ph.GA · 2024-12

A two-parameter model shows that ultra diffuse galaxies with globular cluster mass fractions near 10% likely formed clusters very efficiently while destroying only a modest fraction of them.

arxiv:2412.06155 · astro-ph.GA · 2024-12

A review of recent ATLAS and CMS prompt searches for feebly interacting particles, reporting updated exclusion limits without any new experimental result.

arxiv:2412.06297 · hep-ex · 2024-12

A compactified phase-space analysis of four dark matter/phantom scalar interactions shows one model avoids Big Rip singularities, one needs a small coupling to avoid them, and two have singular surfaces that make them unattractive.

arxiv:2412.06501 · gr-qc · 2024-12

The study connects the reheating temperature to the dark matter mass in two gravitational production scenarios and derives narrow viable mass ranges for each.

arxiv:2412.06626 · gr-qc · 2024-12

Two vacuum-decay models fitted to combined cosmological data give a positive decay rate at about six sigma and H0 near 71.6 km/s/Mpc, easing the Hubble tension.

arxiv:2412.06756 · astro-ph.CO · 2024-12

A U(1)_{B-L} inverse-seesaw model realizes warm-inflation freeze-in of fermionic dark matter via a heavy Z' portal, with parameters adjusted to match the observed dark matter abundance and neutrino masses.

arxiv:2412.06778 · hep-ph · 2024-12

Dark matter-admixed quarkyonic neutron stars show f-mode frequencies shifted by up to tens of percent, while universal frequency-density and frequency-compactness relations remain approximately valid.

arxiv:2412.06739 · astro-ph.HE · 2024-12

For a dark-energy-induced dark matter black hole metric, quasinormal mode frequencies decrease in real part and damping as η and λG increase, relative to Schwarzschild.

arxiv:2412.07172 · gr-qc · 2024-12

Sub-GeV dark matter scattering off protons in blazar jets can produce the IceCube neutrino from TXS 0506+056 while evading current dark matter constraints.

arxiv:2412.07861 · astro-ph.HE · 2024-12

Low-temperature freeze-in lets gravity-mediated dark matter stay viable with heavy spin-two mediators and light dark matter, avoiding the tight constraints of the thermal relic picture.

arxiv:2412.07850 · hep-ph · 2024-12

Updated black-hole formation bounds show Population III stars can constrain bosonic asymmetric dark matter at lower masses than neutron stars when a Bose-Einstein condensate forms.

arxiv:2412.07953 · astro-ph.CO · 2024-12

A Fisher forecast shows that adding full-shape intrinsic alignment information to galaxy clustering tightens cosmological constraints, particularly for dark energy and non-flat modified-gravity models.

arxiv:2412.08151 · astro-ph.CO · 2024-12

Random-phase eigenstate constructions of fuzzy dark matter halos carry a computable nonzero initial global velocity, which can be removed or set to any value by a Galilean boost.

arxiv:2412.08372 · astro-ph.CO · 2024-12

Upper limits on the scalar-dark-matter neutrino coupling are derived from DSNB attenuation projected for DUNE/Hyper-K and from IceCube data on NGC 1068 and TXS 0506+056, assuming DM spikes around AGN black holes.

arxiv:2412.08537 · hep-ph · 2024-12

Dark-matter Q-balls in the simplest Friedberg-Lee-Sirlin model can grow to solar masses near galactic centers, but their final radii are about a solar-system wide, so they cannot explain LIGO/Virgo mass-gap events.

arxiv:2412.08803 · astro-ph.CO · 2024-12

A concise review of axion and ALP search experiments, their recent limits, and upcoming projects.

arxiv:2412.08733 · hep-ph · 2024-12

Using LZ2024 limits, the paper derives new lower bounds on gaugino masses and upper bounds on higgsino mass splittings in decoupled-MSSM higgsino dark matter scenarios, plus projections for the neutrino fog.

arxiv:2412.08958 · hep-ph · 2024-12

Two linear interacting dark energy models are fitted to Pantheon and OHD data, yielding opposite interaction directions depending on the dataset and an inconclusive resolution of the coincidence problem.

arxiv:2412.09024 · astro-ph.CO · 2024-12

In FLAMINGO simulations, gas density is biased low by up to about 8% on gigaparsec scales due to star formation, while gas velocities are unbiased on large scales and AGN feedback shapes outflows to tens of virial radii.

arxiv:2412.09526 · astro-ph.CO · 2024-12

In a two-component dark photon model, heavy dark matter annihilation in the Galactic center can boost light dark matter, producing up to about 10 detectable events per year in a 5 kg NEWSdm detector.

arxiv:2412.09847 · hep-ph · 2024-12

In 324 simulated galaxy clusters, the gas shock radius is 1.4 to 1.9 times the dark-matter splashback radius, and the ratio grows with recent mass accretion.

arxiv:2412.09864 · astro-ph.CO · 2024-12

A dark-matter-disc model fits the inner rotation curves of 22 LITTLE THINGS dwarf galaxies as well as the standard NFW halo model, while implying much smaller total masses.

arxiv:2412.09934 · astro-ph.GA · 2024-12

Adiabatic level crossing between a QCD axion and an ALP can convert ALP dark matter into QCD axion dark matter, and a beat-frequency-based adiabatic condition maps the viable parameter region.

arxiv:2412.10232 · hep-ph · 2024-12

Using neural ratio estimation on mock HERA power spectra, the authors forecast 95% lower bounds on the thermal WDM mass that exceed the 5.3 keV Lyman-alpha limit when the galaxy threshold mass Mturn is below 1e8 M_sun.

arxiv:2412.10310 · astro-ph.CO · 2024-12

A 10 kg forward neutrino detector at a 3 TeV muon collider could probe neutrinophilic scalar mediators down to couplings that reach thermal freeze-out and freeze-in dark matter relic targets.

arxiv:2412.10315 · hep-ph · 2024-12

A photon is modeled as a dark photon plus a massless light-wave; dark photons, formed when light-waves disappear, are claimed to explain dark matter, dark energy, redshift, and other phenomena.

arxiv:2412.10661 · physics.optics · 2024-12

The paper argues that Stueckelberg or longitudinal-photon particles with mass near 10^-19 eV, condensed into a Bose-Einstein condensate, can account for dark matter.

arxiv:2412.10806 · hep-ph · 2024-12

A neutron-beam Rabi oscillation setup with double Stern-Gerlach spin selection could reach fa/Cn around 1.3e7 GeV and probe axion dark matter masses from 3e-13 to 1e-10 eV.

arxiv:2412.10832 · hep-ph · 2024-12

Entropic corrections to gravity, fitted to cosmic chronometers, BAO, and strong-lensing data, can mimic dark energy and yield H0 close to SH0ES, though the statistical evidence is weak.

arxiv:2412.11260 · gr-qc · 2024-12

3C 59, an elliptical radio-loud quasar host, shows renewed star formation in the last 500 million years, which the authors attribute to ongoing minor mergers with quenched satellite galaxies.

arxiv:2412.11367 · astro-ph.GA · 2024-12

Accounting for radiative feedback and formation-time effects, accretion grows primordial black holes by at most a few percent in the radiation era and negligibly in the baryonic Park-Ricotti model, while the Bondi model with dark-matter halos allows orders-of-magnitude growth only for high…

arxiv:2412.11921 · astro-ph.CO · 2024-12

A lognormal seminumerical simulator of the Lyman-alpha forest, fit to observed flux power spectra, returns estimates of the intergalactic temperature, temperature-density slope, and Jeans length at z=3 to 5.

arxiv:2412.11909 · astro-ph.CO · 2024-12

In explicit string theory compactifications, fuzzy axion dark matter is rare and typically requires fine-tuning of initial axion displacements or a non-standard reheating epoch to avoid overproducing heavier axions.

arxiv:2412.12012 · hep-th · 2024-12

A Z4-symmetric Dirac seesaw makes the imaginary part of a seesaw scalar a stable dark matter candidate and links its phenomenology to gravitational wave and CMB observables.

arxiv:2412.12267 · hep-ph · 2024-12

A status report on DarkNESS, a 6U CubeSat that would be the first space deployment of skipper-CCDs to search for dark matter X-ray lines and sub-GeV electron recoils from low Earth orbit.

arxiv:2412.12084 · astro-ph.IM · 2024-12

SPHEREx should improve current limits on the axion-photon coupling for 0.5-3 eV ALP dark matter by observing the Milky Way halo in its deep field, the LMC, and dwarf spheroidals.

arxiv:2412.12286 · astro-ph.CO · 2024-12

Low-temperature reheating shifts the relic-density contours of Z'-mediated dark matter so that WIMP and FIMP solutions merge and new regions become testable.

arxiv:2412.12303 · hep-ph · 2024-12

Using 3266 days of IceCube data, no dark matter annihilation signal from the Earth's center was found, and the resulting spin-independent scattering limits are the strongest among neutrino telescopes for WIMP masses above 100 GeV.

arxiv:2412.12972 · astro-ph.HE · 2024-12

Using NANOGrav 15-year data, four modified Hellings-Downs models are compared; spin-2 ultralight dark matter and massive gravity match the standard prediction, while weak, non-definitive evidence favors a non-Gaussian component and ultralight vector dark matter.

arxiv:2412.12975 · astro-ph.CO · 2024-12

Cosmological zoom-in simulations show that suppressing the small-scale matter power spectrum, as expected in self-interacting dark matter models, reduces or erases the gravothermal core-collapse signature in dwarf-mass halos.

arxiv:2412.13065 · astro-ph.CO · 2024-12

JWST NIRSpec dark calibration images exclude previously allowed high-cross-section parameter space for sub-GeV dark matter coupled to an ultralight dark photon, for subcomponent fractions as low as about 0.01%.

arxiv:2412.13131 · astro-ph.CO · 2024-12

A parameter-space scan shows that very large curvature-current couplings can fit the baryon asymmetry and dark matter abundance, while the electric charge of the black hole plays no role in the mechanism.

arxiv:2412.13254 · hep-ph · 2024-12

During reheating, freeze-in from the gravitationally produced radiation bath can dominate the dark matter relic density for DM masses above the reheating temperature, with k- and n-dependent constraints.

arxiv:2412.13288 · hep-ph · 2024-12

The paper redefines the MOND acceleration ratio and the Bullet Cluster dark matter fraction as a creep coefficient of space and claims dark matter effects are spacetime creep.

arxiv:2412.13277 · gr-qc · 2024-12

TeV-scale Higgs-portal dark matter produces Higgs mass corrections larger than the measured Higgs mass, which excludes most such WIMPs except near half the Higgs mass.

arxiv:2412.13301 · hep-ph · 2024-12

A survey of early 20th century astronomy shows 'dark matter' was used for light-blocking dust as well as missing mass, weakening the standard narrative of a single continuous dark-matter concept.

arxiv:2412.13404 · physics.hist-ph · 2024-12

A new U(1) extension of the Standard Model is proposed, with a neutrino-coupled gauge boson and a dark Higgs scalar as a freeze-in dark matter candidate, yielding an estimated coupling between 10^-8.5 and 10^-6 times the electroweak coupling.

arxiv:2412.13829 · hep-ph · 2024-12

A seesaw model with spontaneously broken lepton number can simultaneously explain dark matter as a freeze-in Majoron and the baryon asymmetry through resonant leptogenesis, with one set of dimension-five operators controlling both.

arxiv:2412.14121 · hep-ph · 2024-12

A one-parameter interacting dark sector model can shift H0 upward and S8 downward when fit to Planck, DESI and supernova data, but the Bayesian evidence over LambdaCDM is inconclusive without SH0ES calibration.

arxiv:2412.14139 · astro-ph.CO · 2024-12

Long-baseline atom interferometers could detect ultra-light spin-2 dark matter through three coupling channels, reaching mass and coupling ranges that LIGO and LISA cannot cover.

arxiv:2412.14282 · hep-ph · 2024-12

Using two clustering mechanisms, concurrent collapse and gravitational clustering, the authors derive hot dark matter density profiles and recast CDM telescope bounds into axion-photon coupling limits for 1 to 10 eV axions.

arxiv:2412.14264 · hep-ph · 2024-12

Dark baryons made of SU(2)_L multiplet dark quarks are predicted to be dominated by an SU(2)_L singlet state above TeV masses, which strongly suppresses interactions with the Standard Model.

arxiv:2412.14240 · hep-ph · 2024-12

At a 10 TeV muon collider, fermion-portal dark matter mediators could be discovered up to about 4.7 TeV, and including the muon parton distribution in simulations lowers the predicted reach and changes signal shapes.

arxiv:2412.14235 · hep-ph · 2024-12

Warm wave dark matter free streaming can shift by up to roughly 40% in a very early dark energy cosmology, while early matter domination moves the signal to unobservably small scales.

arxiv:2412.14322 · astro-ph.CO · 2024-12

Monte Carlo simulations show the corrected Spergel and Press formalism reproduces dark matter heat transport in realistic Sun, brown dwarf, and Earth models, but with per-scenario fitted parameters.

arxiv:2412.14342 · hep-ph · 2024-12

The BNT transform of cosmic shear data makes ℓ-space cuts behave like k-space cuts, reducing nonlinear scale leakage and preserving unbiased S8 constraints in Euclid-like forecasts.

arxiv:2412.14704 · astro-ph.CO · 2024-12

A QCD axion's Goldstone nature suppresses its coupling to neutron-antineutron oscillation, but ALPs with a derivative coupling can produce a resonant Rabi oscillation.

arxiv:2412.14823 · hep-ph · 2024-12

For a Schwarzschild black hole in a relativistic Hernquist dark matter halo, quasinormal-mode frequency shifts scale as (MDM/rs)^(3/2) rather than linearly, while tidal Love numbers are small and sensitive to the choice of fluid perturbation variables.

arxiv:2412.14831 · gr-qc · 2024-12

A workshop summary that compiles physics targets, technology advances, and a proto-collaboration roadmap for kilometer-scale atom interferometers aimed at dark matter and gravitational wave detection.

arxiv:2412.14960 · hep-ex · 2024-12

For circular orbits in ultralight dark matter, the dynamical friction on a Plummer sphere is the point-probe result multiplied by the cluster's momentum-space form factor, with deviations growing at large size-to-orbit ratios and high Mach numbers.

arxiv:2412.15428 · astro-ph.GA · 2024-12

Numerical simulations show that black holes act as condensation points for fuzzy dark matter cores, with larger black hole masses producing lower central core densities.

arxiv:2412.15465 · astro-ph.GA · 2024-12