Physicists using near-absolute-zero detectors have reached unprecedented sensitivity in the hunt for light dark matter.
A groundbreaking scientific project known as QROCODILE, led by the University of Zurich and the Hebrew University of Jerusalem, has reached unprecedented sensitivity in the search for light dark matter. By using superconducting detectors cooled to temperatures near absolute zero, the research team has established world-leading constraints on how dark matter might interact with regular matter, opening new possibilities for discoveries in one of physics’ most enduring puzzles.
Dark matter, the mysterious material thought to make up about 85% of the universe’s total mass, continues to baffle scientists. It does not emit or absorb light and cannot be detected directly, leaving researchers to infer its existence through its gravitational effects on galaxies and cosmic structures. Despite decades of experiments, no one has yet observed dark matter particles directly.
An international team of physicists is now reporting encouraging early results from the QROCODILE experiment (Quantum Resolution-Optimized Cryogenic Observatory for Dark matter Incident at Low Energy). This collaboration, led by the University of Zurich and the Hebrew University of Jerusalem and including Cornell University, the Karlsruhe Institute of Technology (KIT), and MIT, has demonstrated a powerful new approach to exploring the possible existence of “light” dark matter particles.
Ultra-Sensitive Superconducting Detection
At the heart of QROCODILE is a cutting-edge superconducting detector capable of measuring incredibly faint energy deposits — down to just 0.11 electron-volts, millions of times smaller than the energies usually detected in particle physics experiments. This sensitivity opens an entirely new frontier: testing the existence of extremely light dark matter particles, with masses thousands of times smaller than those probed by previous experiments.
In a science run lasting more than 400 hours at temperatures near absolute zero, the team recorded a small number of unexplained signals. While these events cannot yet be confirmed as dark matter — they may stem from cosmic rays or natural background radiation — they already allow researchers to set new world-leading limits on how light dark matter particles interact with electrons and atomic nuclei
An additional strength of the experiment is its potential to detect the directionality of incoming signals. Since the Earth moves through the galactic halo, dark matter particles are expected to arrive from a preferred direction. Future upgrades could allow scientists to distinguish between true dark matter signals and random background noise, a crucial step toward a definitive discovery.
Prof. Yonit Hochberg of the Racah Institute of Physics at the Hebrew University, one of the project’s lead scientists, explains: “For the first time, we’ve placed new constraints on the existence of especially light dark matter. This is an important first step toward larger experiments that could ultimately achieve the long-sought direct detection.”
The next stage of the project, NILE QROCODILE, will further enhance the detector’s sensitivity and move the experiment underground to shield it from cosmic rays. With improved shielding, larger detector arrays, and even lower energy thresholds, the researchers aim to push the boundaries of our understanding of the dark universe.
Reference: “First Sub-MeV Dark Matter Search with the QROCODILE Experiment Using Superconducting Nanowire Single-Photon Detectors” by Laura Baudis, Alexander Bismark, Noah Brugger, Chiara Capelli, Ilya Charaev, Jose Cuenca García, Guy Daniel Hadas, Yonit Hochberg, Judith K. Hohmann, Alexander Kavner, Christian Koos, Artem Kuzmin, Benjamin V. Lehmann, Severin Nägeli, Titus Neupert, Bjoern Penning, Diego Ramírez García and Andreas Schilling, 20 August 2025, Physical Review Letters.
DOI: 10.1103/4hb6-f6jl
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9 Comments
More dumb – how is it, that the established sciences can’t seem to think? This is like a person living in a hovel, trying to find the City of Oz – sure that it must be in the hovel, somewhere.
When they have to get out of their hovel – and turn right.
They are established sciences, which is improving society in any number of cost effective ways and cannot be considered “dumb” by fiat or by result. What have you done for sciences lately?
Light dark mater as opposed to heavy dark matter…………and middle-weight dark matter. Then there will be “up” dark matter and “down” dark matter, as well as “top” dark matter and “bottom” dark matter……..and then it-don’t-matter. Quarky sense of humour.
This only happens after the don’t-matter is blown apart at CERN – but where researchers go ahead and think the atom-bomb level energies should just be folded back up and assumed to be particles.
WOW you’re stupid… How were YOU the fastest sperm?
Dark matter does not exist. I accept it as a placeholder for our broken gravity model, nothing more. JWTS has proven beyond any doubt that it does not exist and yet you continue to push misinformation.
“Placeholders” are used in math equations, not in sciences. General relativity is not broken, it has passed every test with flying colors and while competition has fallen by the wayside it reigns supremely.
“Troubled Times for Alternatives to Einstein’s Theory of Gravity
New observations of extreme astrophysical systems have “brutally and pitilessly murdered” attempts to replace Einstein’s general theory of relativity.” {Quanta magazine, April 30, 2018, after the 2017 multimessenger observation of a binary neutrino star merger had been analyzed.]
JWST is observing dark matter regularly and hence proves its existence and disproves your claim. “Remarkable JWST trick lets us “see” dark matter”. [Starts with a bang, Dec 12, 2022] ““Webb’s images dramatically improve what we can measure in this scene — including pinpointing the position of invisible particles known as dark matter,” said Kyle Finner, a co-author and an assistant scientist at IPAC at Caltech in Pasadena, California.” [NASA, Jun 30, 2025]
Ask yourself if it is you that, for some personal reason unrelated to professional science and the hard work of professional scientists, push misinformation. Because for others it looks precisely like that.
They’re really reaching hard to try to explain any other possibility other than the simplest one – Creation by a Creator. It’s also what everything points to Scientificly.
“… opening new possibilities …” They are living in de NILE about what setting lowered constraints mean – the improved instrument is only closer to detection if there is something there.
Else, a good status update.