Dark Matter

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

Decaying composite dark matter in the 1 to 10 GeV mass range is most strongly constrained by AMS-02 positron data, needing lifetimes above roughly 10^26 seconds.

arxiv:2412.15641 · hep-ph · 2024-12

Spherically symmetric pulsations trigger homoclinic chaos in orbits around black holes enclosed by dark matter halos, unlike the vacuum Schwarzschild case.

arxiv:2412.15938 · gr-qc · 2024-12

Electron-sensitive superconducting detectors are simultaneously sensitive to dark matter-nucleon interactions, yielding new bounds on MeV-scale hadrophilic dark matter.

arxiv:2412.16283 · hep-ph · 2024-12

A dark sector phase transition at the MeV scale, with a dark Higgs mass around 3 MeV, can reproduce the gravitational wave background seen by pulsar timing arrays.

arxiv:2412.16282 · hep-ph · 2024-12

A scalable tiled Micromegas readout plane and a face-to-face connector were developed and commissioned for the PandaX-III and TREX-DM rare-event searches.

arxiv:2412.16313 · physics.ins-det · 2024-12

Extended flat rotation curves are explained by warm dark matter halos born isothermal, growing by populating the tail of the Maxwell-Boltzmann distribution as the universe expands.

arxiv:2412.17869 · astro-ph.GA · 2024-12

A two-component dark matter model with an inert triplet scalar and a singlet fermion can explain the relic abundance while producing a strong electroweak phase transition and gravitational wave signals detectable by LISA, BBO, and DECIGO.

arxiv:2412.17141 · hep-ph · 2024-12

A Bayesian mixture model that fits dark matter annihilation channel ratios directly from gamma-ray event data, demonstrated on simulated CTAO observations.

arxiv:2412.17172 · astro-ph.HE · 2024-12

Dark matter can be produced by photon annihilation through a loop-generated F² operator, a new photonic freeze-in scenario that is testable at low reheat temperatures.

arxiv:2412.17308 · hep-ph · 2024-12

Hadronic axion models with d=6 and d=7 heavy-quark decay operators can produce two new cosmologically viable 'islands' at f_a ~ 10^12 and 10^14 GeV, extending the post-inflationary axion search window.

arxiv:2412.17896 · hep-ph · 2024-12

A feebly-interacting PQ scalar with large wave-function renormalization can generate a large axion decay constant while keeping all mass scales near the TeV scale, predicting a light PQ Higgs and new dark matter scenarios.

arxiv:2412.17802 · hep-ph · 2024-12

Fermionic dark matter halos around supermassive black holes can form non-power-law spikes or even density depletions, depending on the fermion mass and degeneracy, instead of the universal r^-3/2 spike of power-law halos.

arxiv:2412.17919 · astro-ph.GA · 2024-12

Mirror dark matter inside proto-neutron stars reduces maximum mass, radius, and tidal deformability while heating the remnant and raising the speed of sound.

arxiv:2412.17946 · hep-ph · 2024-12

Expected sensitivity of phonon-based light dark matter detectors varies by a factor of 2-3 depending on which Gaia-inspired dark matter substructure is assumed, because anharmonic crystal effects depend on the dark matter velocity distribution.

arxiv:2412.18330 · hep-ph · 2024-12

A likelihood fit of Fermi-LAT 4FGL-DR4 unassociated sources finds 32 dark matter subhalo candidates with fitted masses mostly 30 to 500 GeV.

arxiv:2412.18736 · astro-ph.HE · 2024-12

Cosmic bubble collisions in runaway first-order phase transitions can, if the runaway regime holds, produce particles with masses far above the transition scale and energies approaching the Planck scale.

arxiv:2412.18752 · hep-ph · 2024-12

The authors provide full (MC)RRPA atomic response functions for xenon and germanium for sub-GeV dark matter-electron scattering, and report a low-energy spin-dependent response distinct from the spin-independent one.

arxiv:2501.04020 · astro-ph.CO · 2024-12

A KSVZ-like model with a fermion dark matter candidate produced by UV freeze-in through the axion portal is shown to have viable parameter space at TeV mass and axion decay constant near 10^10 to 10^11 GeV.

arxiv:2412.19094 · hep-ph · 2024-12

Head-on collisions of fuzzy dark matter solitons leave an oscillating merged soliton that emits gravitational waves with periods from a few years to tens of years for particle masses of 1e-17 to 1e-18 eV/c^2.

arxiv:2412.19262 · astro-ph.CO · 2024-12

A Fisher-matrix forecast finds the Hongmeng 21 cm global spectrum mission could probe DM annihilation cross sections down to ~1e-28 cm3/s, decay lifetimes to ~1e28 s, and PBH abundances to f_PBH ~ 1e-6, under ideal noise conditions.

arxiv:2412.19257 · astro-ph.CO · 2024-12

The QCD instanton potential can act as a bias that collapses the domain walls of the Nelson-Barr axion, dynamically selecting the CP-conserving vacuum and yielding either dark matter or a NANOGrav-range gravitational wave background.

arxiv:2412.19456 · hep-ph · 2024-12

A composite Higgs model in which dark matter mass and a light scalar mediator both arise from hypercolor dynamics, giving velocity-dependent self-interacting dark matter with a claimed viable thermal relic.

arxiv:2412.19371 · hep-ph · 2024-12

A QCD axion with decay constant around 1e9 to 1e10 GeV, as predicted in the dark dimension scenario, can supply all dark matter if an ALP of mass about 1e-5 eV and decay constant about 1e11 GeV resonantly converts into it.

arxiv:2412.19426 · hep-th · 2024-12

For neutrinos deflected by a black hole embedded in phantom-field dark matter, the oscillation phase gains a logarithmic dark matter correction, while radially moving neutrinos see no net gravity effect.

arxiv:2608.07615 · hep-ph · 2026-08

The rate of compound gravitational-wave lensing by intermediate-mass black holes in globular clusters is at most about 10^-3 of galaxy-scale lensed events, disfavoring GW231123 as such an event.

arxiv:2608.07667 · astro-ph.CO · 2026-08

For black holes in generalized (alpha,beta,gamma) dark matter halos, the axial ringdown shift is set by a single redshift integral, while the tidal Love number depends on an outer radial moment, making the two observables complementary.

arxiv:2608.07678 · gr-qc · 2026-08

FLAGS-I delivers the deepest JWST/NIRCam number counts to date, new 2.77 and 4.10 micron IGL constraints, and a model comparison that ranks SC-SAM first.

arxiv:2608.07668 · astro-ph.GA · 2026-08

Capture-driven accumulation of asymmetric dark matter in neutron stars stays gravitationally subdominant over a Hubble time and produces no detectable changes in tidal observables.

arxiv:2608.07729 · astro-ph.HE · 2026-08

A disformal dark matter-gravity coupling length is constrained to be very small by CLASH cluster lensing, consistent with general relativity.

arxiv:2412.19569 · astro-ph.CO · 2024-12

A non-supersymmetric SU(5) GUT with a 200F quintuplet dark matter and two TeV-scale sextet fermion pairs can achieve gauge coupling unification near the Planck scale.

arxiv:2412.19660 · hep-ph · 2024-12

PandaX-4T reports the strongest upper limit to date on solar-boosted dark matter scattering off electrons, down to 3.51e-39 cm^2 at a dark matter mass of 0.08 MeV/c^2.

arxiv:2412.19970 · hep-ex · 2024-12

Current data restrict the g~-SUGRA scenario to tanβ ≳ 5 and M0 ≳ 20 tanβ GeV, with large muon g-2 contributions difficult and future colliders needed to cover the remaining parameter space.

arxiv:2412.20003 · hep-ph · 2024-12

Adding a Dehnen dark matter halo and string cloud to a Schwarzschild black hole makes its shadow larger, but the paper's quasinormal-mode frequencies rest on a misstated perturbation potential.

arxiv:2412.20037 · gr-qc · 2024-12

A kinetically coupled tachyon dark energy model admits a new stable scaling attractor for a range of coupling and potential parameters, providing a mechanism to keep dark energy and dark matter densities comparable.

arxiv:2412.20118 · gr-qc · 2024-12

EHT shadow sizes give P̃_y≤0.17 for extra-dimensional photon momentum and k≤0.074 for halo compactness, but the headline 2.16 to 2.6 mm extra-dimension length is not robust.

arxiv:2412.20109 · gr-qc · 2024-12

Three explicit model frameworks correlate tiny neutrino mass with proton longevity, either through a common dark matter source, through proton decay generating neutrino mass, or through neutrino mass mediating proton decay.

arxiv:2412.20723 · hep-ph · 2024-12

Dark matter shells collapsing nonradially through the center of a primordial black hole binary accelerate its merger, boosting the merger rate by a factor of a few.

arxiv:2412.20859 · astro-ph.CO · 2024-12

For self-interacting dark matter inside neutron stars, the particle mass and mass fraction control the structure, while magnetic fields up to 3 x 10^18 G only slightly reduce the maximum mass.

arxiv:2412.21097 · nucl-th · 2024-12

The thermal gravitational wave amplitude at around 100 GHz is set by the mass and spin of purely gravitational dark matter, so future ultra-high-frequency detectors could probe the scenario.

arxiv:2412.21137 · hep-ph · 2024-12