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A direct empirical proof of the existence of dark matter
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A direct empirical proof of the existence of dark matter
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We present new weak lensing observations of 1E0657-558 (z=0.296), a unique cluster merger, that enable a direct detection of dark matter, independent of assumptions regarding the nature of the gravitational force law. Due to the collision of two clusters, the dissipationless stellar component and the fluid-like X-ray emitting plasma are spatially segregated. By using both wide-field ground based images and HST/ACS images of the cluster cores, we create gravitational lensing maps which show that the gravitational potential does not trace the plasma distribution, the dominant baryonic mass component, but rather approximately traces the distribution of galaxies. An 8-sigma significance spatial offset of the center of the total mass from the center of the baryonic mass peaks cannot be explained with an alteration of the gravitational force law, and thus proves that the majority of the matter in the system is unseen.
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Cited by 60 Pith papers
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Search for decays of the Higgs boson into pair-produced pseudoscalar particles decaying into $\tau^+\tau^-\tau^+\tau^-$ using $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector
No significant excess is observed; 95% CL upper limits on B(H→aa→4τ) range from 0.06 to 0.23 for ma between 15 and 60 GeV.
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Accelerated inference of microlensed gravitational waves with machine learning
A neural posterior estimator trained on wave-optics-microlensed gravitational-wave signals recovers source and lens parameters and Bayes factors consistent with Bilby, about 10 times faster.
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Dark Matter Heating in Evolving Proto-Neutron Stars: A Two-Fluid Approach
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Search for emerging jets in $pp$ collisions at $\sqrt{s} = 13$ TeV with the ATLAS experiment
No excess of emerging-jet events appears in ATLAS Run 2 data, excluding pair-produced dark scalar mediators up to about 2 TeV for 20 GeV dark pions with 20 mm decay length.
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Effect of Cosmic Neutrino Background on the Dark Matter Self-interaction via Neutrino force
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Dark Photon - ALP Freeze-in: 511 keV and H$\alpha$ Constraints
A nearly degenerate ALP–dark-photon freeze-in model can reproduce the relic density and the 511 keV line while passing Hα and other constraints only in a narrow window with Λ≈10^10–10^12 GeV and ϵ≈10^-24–10^-23.
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Dynamical dark energy remains preferred across extended models while curvature, neutrino mass and inflation parameters show strong model dependence, with no resolution of the H0 tension.
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Ultralight dark matter mixed with primordial black holes
In mixed ULDM-PBH halos the continuum PBH contribution alters soliton structure at the tens-of-percent level while discrete shot noise induces mode transitions too slow to matter on galactic timescales.
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GIGA-Lens 2.0: Strong-Lens Modeling on Multiple GPU Nodes
GIGA-Lens 2.0 scales strong gravitational lens modeling across up to 128 GPU nodes and demonstrates it on 100 simulated systems plus one real DESI lens.
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Shedding Stray Light on Decaying Light Dark Matter: Constraints from NuSTAR X-ray Observations
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Freeze-in $SU(2)$ vector dark matter at low reheating temperature
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Distinguishing Higgs portal and neutralino dark matter via vector boson fusion
Vector boson fusion processes at the LHC distinguish Higgs portal dark matter from neutralino dark matter at over 5 sigma using jet kinematics and a Kolmogorov-Smirnov test with linear discriminant analysis.
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Observation of neutron stars at 1000-1200 K could constrain asymmetric dark matter self-interaction cross-sections by two orders of magnitude beyond bullet cluster limits.
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