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LUX draws a blank on dark matter
The latest and final LUX results exclude the parameter space above the black line, representing a four-fold over the previous LUX result for high WIMP masses. Green and yellow bands show the one- and...
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Probing dark matter with CMS
Fig. 2. Feynman diagrams showing the production of the mediator and its decay to SM (left) and DM (right) particles. The former yields a dijet topology while the latter produces events with a...
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LUX-ZEPLIN passes approval milestone
A mini version of the future LZ dark-matter detector at a test stand at the SLAC National Accelerator Laboratory, showing the detector TPC core (white container). Image credit: SLAC National...
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What is AMS telling us?
A simulation of the distribution of dark matter in the early universe. Clumps of dark matter are shown in red, with yellow indicating clumps weighing more than 300 million solar masses.Image credit:...
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Linking waves to particles
Gravitational waves could provide a link between strong gravity (left) and particle physics (right). Black holes are arguably humankind’s most intriguing intellectual construction. Featuring a...
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Testing WIMPs to the limit
A surface building at Gran Sasso National Laboratory in Italy, which hosts a network of caverns shielded from cosmic radiation.Image credit: L Baudis. Dark matter is one of the greatest mysteries of...
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WIMP no-show in gamma-ray background
Fluctuations in the isotropic gamma-ray background (IGRB), based on 81 months of Fermi data. Emissions from our own galaxy and from bright extra-galactic sources are masked in grey.Image credit: M...
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Funding injection for SNOLAB
The second-generation DEAP-3600 detector at SNOLAB, which uses 3600 kg of liquid argon to search for WIMPs.Image credit: SNOLAB. The SNOLAB laboratory in Ontario, Canada, has received a grant of $28.6m...
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BaBar casts further doubt on dark photons
Regions of the dark-photon parameter space (mixing strength versus mass) excluded by BaBar (green) compared with the previous constraints. The new analysis rules out dark-photon coupling as the...
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Milestone for US dark-matter detector
Photomultiplier tubes surrounded by polytetrafluoroethylene for the LZ experiment, which is managed by Lawrence Berkeley National Laboratory.Image credit: LBNL. The US Department of Energy (DOE) has...
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Doubting darkness
Erik Verlinde of the University of Amsterdam in the Netherlands photographed at CERN in April following his seminar on emergent gravity. Image credit: J Ordan/CERN. What is wrong with the theory of...
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How dark matter became a particle
Astronomers have long contemplated the possibility that there may be forms of matter in the universe that are imperceptible, either because they are too far away, too dim or intrinsically invisible....
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Euclid to pinpoint nature of dark energy
The accelerating expansion of the universe, first realised 20 years ago, has been confirmed by numerous observations. Remarkably, whatever the source of the acceleration, it is the primary driver of...
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Dark-matter surprise in early universe
Schematic representation of rotating disc galaxies in the local (left) and the distant, early universe (right). The effect of dark matter (shown in red) is to increase the rotation speed of the outer...
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Survey reveals edge of dark-matter halos
Simulation showing the density of a galaxy cluster, with a clear edge in the density (dashed line) induced by the process of “splash back”.Image credit: ApJ/DOI:10.1088/0004-637X/810/1/36....
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CAST experiment constrains solar axions
The latest constraints on the two-photon coupling, gaγ, of axions and other similar particles as a function of mass, showing the new CAST limits. In a paper published in Nature Physics, the CERN Axion...
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XENON1T releases first data
The XENON1T detector and the three-storey building next door containing auxiliary equipment.Image credit: R Corrieri and P De Perio. Researchers from the XENON1T dark-matter experiment at Gran Sasso...
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CMS expands scope of dark-matter search in dijet channel
95% C.L. upper limits on the universal quark coupling gʹq (left vertical axis), and the resonance decay width Γ divided by mass (right vertical axis) as a function of the mass of the mediator (a...
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Study links solar activity to exotic dark matter
Distributions of M-class solar flares as a function of Mercury’s heliocentric longitude with the constraint of Venus being at longitude between 215°–305° (top) and between 35°–125° (bottom). The dotted...
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Largest WIMP survey sets new limits
The latest limits on WIMP interactions, derived from one year of XENON1T data. The inset compares the new XENON1T limit and sensitivity with those of previous experiments. On 28 May, the world’s...
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Search for WISPs gains momentum
Test setup of the MADMAX experiment with sapphire plates to allow the detection of axion–photon conversion. Credit: S Knirck/MPI Understanding the nature of dark matter is one of the most pressing...
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CMS looks into the dark
Fig. 1. A 3D tower view of an event with two jet candidates containing multiple displaced vertices. The inset shows the zoomed-in ρ–ϕ view with the innermost pixel layer. The red dot is the primary...
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Defeating the background in the search for dark matter
Inspecting photomultiplier tubes for the DarkSide-50 detector. Image credit: Y Suvorov. Compelling cosmological and astrophysical evidence for the existence of dark matter suggests that there is a new...
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The deepest clean lab in the world
A view of the SNOLAB underground laboratory. Image credit: SNOLAB Deep in a mine in Greater Sudbury, Ontario, Canada, you will find the deepest flush toilets in the world. Four of them, actually,...
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Report summarises dark-sector exploration
The regions in the mediator versus dark-matter mass plane excluded at 95% CL by dijet, di-b-jet, top and E Tm iss + X searches for vector-mediator simplified models. A report from the ATLAS experiment...
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Colliders join the hunt for dark energy
Events such as this, showing the second highest E T miss monojet event recorded in the 2016 ATLAS data, were used to search for signs of dark energy. Credit: ATLAS It is 20 years since the discovery...
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Interdisciplinary physics at the AEDGE
Workshop on Atomic Experiments for Dark Matter and Gravity Exploration AEDGE could observe the infalls and mergers of binary massive black holes. The toy models correspond to a redshift z = 2. Credit:...
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Black-hole image constrains ultra-light dark matter
Supermassive black hole M87*. Credit: EHT Collaboration Hooman Davoudiasl and Peter Denton of Brookhaven National Laboratory have used the recent Event Horizon Telescope image of supermassive black...
View ArticleBlack-hole snap scoops 2020 Breakthrough Prize in Fundamental Physics
The first direct image of a black hole, obtained by the Event Horizon Telescope (EHT) collaboration earlier this year, has been recognized by the 2020 Breakthrough Prize in Fundamental Physics. The $3...
View ArticleBASE tests antimatter’s dark side
A first-of-its-kind experiment at CERN has brought dark matter and antimatter face to face. The fundamental nature of dark matter, inferred to make up around a quarter of the universe, is unknown, as...
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CMS goes scouting for dark photons
Fig. 1. Dimuon invariant-mass distributions obtained from data collected by the standard dimuon triggers (red) and the dimuon scouting triggers (green). One of the best strategies for searching for new...
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First physics for Belle II
The SuperKEKB accelerator and the Belle II detector in Tsukuba, Japan. Credit: KEK/Belle II The Belle II collaboration at the SuperKEKB collider in Japan has published its first physics analysis: a...
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Funky physics at KIT
The FUNK experimental area, where the black-painted floor can be seen with the PMT-camera pillar at the centre and the mirror on the left. A black-cotton curtain encloses the whole area during running....
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Researchers grapple with XENON1T excess
An intriguing low-energy excess of background events recorded by the world’s most sensitive WIMP dark-matter experiment has sparked a series of preprints speculating on its underlying cause. On 17...
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LHCb explores dark-sector confinement
Fig. 1. 90% confidence upper limits on the kinetic mixing strength between photons and composite hidden-valley bosons, X (colour scale), for a scenario that exhibits confinement, as a function of mass...
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ALICE’s dark side
The nature of dark matter (DM) remains one of the most intriguing unsolved questions of modern physics. Astrophysical and cosmological observations suggest that DM accounts for roughly 27% of the...
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Cornering WIMPs with ATLAS
Dark matter is estimated to account for an unseen 85% of matter in the universe, but its nature is unknown. One possible explanation is weakly-interacting massive particles, or WIMPs, which could...
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Strong interest in feeble interactions
Scaling the ALPs Searches for axion-like particles (ALPs) at helioscopes, haloscopes and accelerators span more than 18 orders of magnitude in mass and 16 orders of magnitude in the coupling of axions...
View ArticleA long-lived paradigm shift
Searches for new physics at high-energy colliders traditionally target heavy new particles with short lifetimes. These searches determine detector design, data acquisition and analysis methods....
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In search of WISPs
Light through a wall The ALPS II experiment at DESY will target axion-like particles suggested by astrophysical anomalies. Credit: DESY/Heiner Müller-Elsner The Standard Model (SM) cannot be the...
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Tooling up to hunt dark matter
Dark modelling The famous Bullet Cluster, in which the mass distribution of two colliding clusters (blue) and the distribution of baryonic matter (pink) are overlaid on optical data showing the...
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ANAIS challenges DAMA dark-matter claim
ANAIS fit results for three years of data in the energy range 1-6 keV, both for the modulation (blue) and null hypotheses (red), with the background described by a decaying exponential. Source:...
View ArticleLong-lived particles gather interest
From 25 to 28 May, the long-lived particle (LLP) community marked five years of stretching the limits of searches for new physics with its ninth and best-attended workshop yet, with more than 300...
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Webb prepares to eye dark universe
On 11 March, Webb’s “fine phasing” alignment stage saw each primary mirror segment adjusted to produce one unified image of the same star – also revealing galaxies and stars in the background. Credit:...
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Exploring the CMB like never before
To address the major questions in cosmology, the cosmic microwave background (CMB) remains the single most important phenomenon that can be observed. Not this author’s words, but those of the recent US...
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Identifying dark matter
Greetings from Vienna Many IDM participants met in person for the first time to discuss and exchange the latest dark-matter results. Credit: F Reindl The international conference series on the...
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The axion search programme at DESY
By clicking the “Watch now” button you will be taken to our third-party webinar provider in order to register your details. Want to learn more on this subject?Watch now ALPS II experiment in the HERA...
View ArticleESO’s Extremely Large Telescope halfway to completion
The construction of the world’s largest optical telescope, the Extremely Large Telescope (ELT), has reached its mid-point, stated the European Southern Observatory (ESO) on 11 July. Originally planned...
View ArticlePushing accelerator frontiers in Bern
Novel accelerator concepts will play an important role in future accelerators for high-energy physics. Two relevant scenarios being explored in the framework of the European Union I.FAST project are...
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In defiance of cosmic-ray power laws
Low-Earth orbit The Calorimetric Electron Telescope (extreme left), attached to the exposure facility of the Japanese Kibo module at the ISS. Credit: JAXA In a series of daring balloon flights in 1912,...
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