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Physicists build a donut-shaped magnet to find a particle of ghost-like dark matter



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ESO / L. Calçada

One of the central puzzles in particle physics is to find out what particle (or particles!) Is the dark matter – the form of matter that is responsible for 85% of the mass in the known universe. Some physicists believe that searching for a hypothetical particle, known as "axon", could lead to a better understanding of the dark matter and hunt it, a team of American physicists recently designed and tested the form of basketball

It is believed that axes can be found by looking at an unusual sort of neutron star, known as the "magnet". These small, erupting stars create some of the most powerful magnetic fields in the universe. Due to their gigantic magnetic force, the axons would become radio waves in the presence of a magnet ̵

1; and therefore discovered by the telescopes on Earth. The full name is "Broadband / Resonance Approach to Detecting Space Action with Ring B Enhancer" so theoreticians deserve applause for this backcronym.) The experiment consists of a donut (or "toroid") device hanging in a freezer well above the absolute zero and finely tuned to create its own magnetic field.

If there are axons, the magnetic field in the middle of the donut

"This is elegant for this experiment," says Lindley Winslow, chief project investigator, in a press release. "Technically, if you saw this magnetic field, it could only be axiomatic because of the specific geometry that you thought."

However, the team did not find any signs of a "ghostly" particle. While this seems like a bad news for axons enthusiasts, the experiment does not end there. The magnetic field, the energy generated by the axon, is expected to be so small that this particular mileage could not detect it because it looked only in a very specific, narrow range. Like searching the house for a lost remote, the researchers looked only under the couch – they can still watch under the pillows, in the bedroom and behind the TV.

"This is the first time anyone directly looks at this axon," says Winslow. "We are excited to say," We have a way to look at it and know how to do better! "

] The study was published in Physical Review Letters on March 28th.


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