A new way of searching for dark matter reveals the properties of hidden material


New research by Chalmers and ETH Zurich of Switzerland suggest a promising way to detect elusive dark matter particles through previously unexplained nuclear reactions occurring in the detector material. The figure above is a composite image (optical, X-ray, computed dark-matter) of mass distribution in a bullet cluster of galaxies. Credit: Chandra X-ray Observatory, NASA / CXC / M. Weiss / Wikimedia Commons

New research by Chalmers, together with Switzerland’s ETH Zurich, suggests that the detector is a promising way to detect elusive dark matter particles through the already existing nuclear reactions in the material.


The new calculations enable theorists to make detailed predictions about the nature and strength of interactions between dark matter and electrons, which were not possible before.

Ricardo Catena, associate professor in the department, says, “Our new research into these nuclear reactions reveals hitherto hidden physical properties. They cannot be investigated using any of the particles available to us today . ” In Physics at Chalors.

For every star, galaxy, or cloud of dust seen in space, there is five times as much material as the invisible-dark matter. Discovering ways to detect these unknown particles that are such an important part of the Milky Way is therefore a top priority in astrophysics. In the global discovery of dark matter, large detectors are built deep underground to try to capture particles by bouncing atomic nuclei.

Until now, these mysterious particles have survived detection. According to Chalmers researchers, one possible explanation could be that the particles of dark matter are lighter than protons, and that do not cause the nucleus to recur – a ping pong ball collides with a bowling ball. One promising way to overcome this problem is to focus electrons from the nucleus, which are much lighter.

In their recent paper, researchers explain how dark matter can interact with electrons in atoms. They suggest that the rate at which electrons can be kicked out of dark matter atoms depends on four independent atomic reactions – three of which were previously unknown. They have calculated the ways that electrons in the argon and xenon atoms used in today’s largest detectors should respond to dark matter.

The results were recently published in the journal Physical Review Research and performed at ETH in a new collaboration with condensed-matter physicist Nicola Spaldin and her group. His predictions can now be tested at Dark Matter Observatories around the world.

“We tried to remove as many access barriers as possible. The paper is fully published in the Open Access Journal and the scientific code is open source to calculate new nuclear reaction functions, which no one can see ‘under the hood’ Wants. In our paper, “said Timran, a postdoctoral researcher in the Dark Matter group in the Physics Department at Shamers.


Physicists explain the lack of mysterious dark matter in the galaxy pair


more information:
Ricardo Catena et al. Nuclear reactions to normal dark matter – electron interactions, Physical Review Research (2020). DOI: 10.1103 / PhysRevResearch.2.033195

Is provided by Chalmers University of Technology

Quotes: A New Way to Find Dark Matter on Hidden Material Properties (2020, 16 September) 16 September 2020 https://phys.org/news/2020-09-dark-reveals-hidden-materials-properties.html Was taken from.

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