ZME Science
No Result
View All Result
ZME Science
No Result
View All Result
ZME Science

Home → Research → Discoveries

Dark matter experiment finds three tangible clues of its existence

Tibi PuiubyTibi Puiu
April 16, 2013
in Discoveries, Physics
A A
Share on FacebookShare on TwitterSubmit to Reddit

Despite it makes up more than 85% of all matter in the Universe, dark matter, staying true to its name, has eluded scientists for decades ever since they’ve been trying to identify it with high power particle accelerators and detectors. Recent efforts seem to be paying off as various underground labs, as well as those in space, have reported hints of dark matter in their experiments. The most recent one comes from a lab buried deep within a mine in the US state of Minnesota, from where physicists report they have found three signals that suggest they’ve encountered dark matter. The researchers caution, however, that by no means they’re ready to announce they’ve found dark matter, as this is a claim that requires much deliberation and more precise measurements. We all remember the faster than light neutrinos from CERN, right?

The new results come from the Super Cryogenic Dark Matter Search (SuperCDMS), one of the few labs in the world that are tasked with investigating dark matter – a major constitutive part of the Universe which can not be seen or felt, but whose presence is most undeniable based on its gravitational effects on visible matter, radiation, and the large-scale structure of the universe. Understanding what it is and what kind of subparticles its made out of would come as a tremendous milestone in physics and will deepen our view on how the Universe formed, expands and where it might ultimately lead to.

“It’s certainly something we want to be investigating,” CDMS collaborator Blas Cabrera of Stanford University said.

“This is science, and the further tightening up of what we see – or excluding it – is very important for us to do.”

The hidden everything

The Cryogenic Dark Matter Search experiment uses five towers of dark matter detectors like the ones shown here. Image: Fermilab
The Cryogenic Dark Matter Search experiment uses five towers of dark matter detectors like the ones shown here. Image: Fermilab

Dark matter is believed to rarely interact with normal matter, and to even get a chance to catch a glimpse of it, special conditions need to be met. For instance, for the CDMS experiment,  the scientists chilled germanium and silicon to incredibly cold temperatures such that they may form an environment where dark matter detection is possible since if a dark matter particle passes through, hitting a frigid atom nucleus, it releases charge and heat that the scientists can detect with supersensitive instruments.

This is exactly what happened, as not one, but three signals hinting towards such an event were detected. Their findings show that the signals they’ve detected are  99.81 percent more likely to be caused by a weakly interacting massive particle (WIMP) – particles that emit no light, but cause a gravitational effect, serving as a viable candidate for dark matter – instead of random signal fluctuations, which are believed to be detected only 5.4 percent of the time. Is this enough to announce in all hail of glory the discovery of dark matter? Not nearly. When the discovery of the  higgs boson – the elementary particle that’s thought to grant all matter with mass – was announced at CERN, it was made based on findings that reported measurements in order of five-sigma or certainty of 99.99997%. Current dark matter signals are only three-sigma.

The finding “does not rise anywhere near the level of discovery, nor does it rise anywhere near what we would call ‘evidence for,'” Cabrera said. It is, however, a “region of interest” for future study.

Few places left ‘to run’ for dark matter

So far, preliminary results suggest that if the signal is indeed caused by a WIMP, then the inferring particle must have a mass that is about nine times that of the proton, one that is still consistent with some theories. In 2010, the same CDMS lab reported two hints of dark matter, but it was soon after found that the results were skewed by the instruments themselves. The hint-laden data were taken when CDMS used detectors made of silicon; it has since moved on to germanium detectors.

“There’s been an interesting back-and-forth between experiments,” says CDMS Spokesperson Blas Cabrera of Stanford University and SLAC National Accelerator Laboratory. To investigate this hint, “we’ll certainly need more data. If a signal persists, it will need to be replicated by other experiments with different technologies before it is accepted by the community.”

Dark matter might not have too places left to hide though, as multiple experiments and trying at the same time, using different methods, to pinpoint dark matter signals. Just last month, an important NASA announcement spoke of dark matter hints in measurements taken aboard the International Space Station. The detector, the Alpha Magnetic Spectrometer, detected 400,000 positrons, which are the antimatter “twins” of electrons. These particles may have been created when dark matter particles collided and annihilated each other.

RelatedPosts

Extremely rare double Einstein ring imaged by Hubble
A Massive Particle Blasted Through Earth and Scientists Think It Might Be The First Detection of Dark Matter
First dark matter map spots the invisible substance that might help form galaxies
*Something* is blasting “cosmic bullet holes” through our galaxy

The CDMS findings were announced at the recent meeting of the American Physical Society  and are slated  to be posted to the preprint server Arxiv.

Tags: dark matter

ShareTweetShare
Tibi Puiu

Tibi Puiu

Tibi is a science journalist and co-founder of ZME Science. He writes mainly about emerging tech, physics, climate, and space. In his spare time, Tibi likes to make weird music on his computer and groom felines. He has a B.Sc in mechanical engineering and an M.Sc in renewable energy systems.

Related Posts

News

A Massive Particle Blasted Through Earth and Scientists Think It Might Be The First Detection of Dark Matter

byJordan Strickler
3 weeks ago
News

Astronomers Say They Finally Found Half the Universe’s Matter. It was Missing In Plain Sight

byTibi Puiu
3 months ago
Astronomy

Scientists Take “Baby Picture” of the Infant Universe and Then Weigh It. Here’s What Its First 380,000 Years Tell Us

byMihai Andrei
3 months ago
Science

James Webb Telescope Uses Cosmic “Magnifying glass” to Detect Stars 6.5 Billion Light-Years Away

byJordan Strickler
6 months ago

Recent news

Coolness Isn’t About Looks or Money. It’s About These Six Things, According to Science

July 1, 2025

Ancient Roman Pompeii had way more erotic art than you’d think

July 1, 2025

Wild Orcas Are Offering Fish to Humans and Scientists Say They May Be Trying to Bond with Us

July 1, 2025
  • About
  • Advertise
  • Editorial Policy
  • Privacy Policy and Terms of Use
  • How we review products
  • Contact

© 2007-2025 ZME Science - Not exactly rocket science. All Rights Reserved.

No Result
View All Result
  • Science News
  • Environment
  • Health
  • Space
  • Future
  • Features
    • Natural Sciences
    • Physics
      • Matter and Energy
      • Quantum Mechanics
      • Thermodynamics
    • Chemistry
      • Periodic Table
      • Applied Chemistry
      • Materials
      • Physical Chemistry
    • Biology
      • Anatomy
      • Biochemistry
      • Ecology
      • Genetics
      • Microbiology
      • Plants and Fungi
    • Geology and Paleontology
      • Planet Earth
      • Earth Dynamics
      • Rocks and Minerals
      • Volcanoes
      • Dinosaurs
      • Fossils
    • Animals
      • Mammals
      • Birds
      • Fish
      • Amphibians
      • Reptiles
      • Invertebrates
      • Pets
      • Conservation
      • Animal facts
    • Climate and Weather
      • Climate change
      • Weather and atmosphere
    • Health
      • Drugs
      • Diseases and Conditions
      • Human Body
      • Mind and Brain
      • Food and Nutrition
      • Wellness
    • History and Humanities
      • Anthropology
      • Archaeology
      • History
      • Economics
      • People
      • Sociology
    • Space & Astronomy
      • The Solar System
      • Sun
      • The Moon
      • Planets
      • Asteroids, meteors & comets
      • Astronomy
      • Astrophysics
      • Cosmology
      • Exoplanets & Alien Life
      • Spaceflight and Exploration
    • Technology
      • Computer Science & IT
      • Engineering
      • Inventions
      • Sustainability
      • Renewable Energy
      • Green Living
    • Culture
    • Resources
  • Videos
  • Reviews
  • About Us
    • About
    • The Team
    • Advertise
    • Contribute
    • Editorial policy
    • Privacy Policy
    • Contact

© 2007-2025 ZME Science - Not exactly rocket science. All Rights Reserved.