Cardiff University Scientists Develop New Method to Search for Dark Matter Using Gravitational Waves

Scientists at Cardiff University have devised a novel approach to detect dark matter, a mysterious form of matter that makes up 85% of the universe's mass. By leveraging the precision of the Laser Interferometer Gravitational-Wave Observatory (LIGO), the researchers achieved a factor 10,000 improvement over previous results, focusing on subtle changes in the instrument's mirrors caused by dark matter.

The analysis, published in Physical Review Letters, targeted the interplay between dark matter and the mirrors in LIGO's detectors. The team discovered a new interaction between dark matter and the mirrors, which allowed them to develop detailed simulations and a new calculation method to process the results. The breakthrough has the potential to unlock the secrets of dark matter and could lead to a better understanding of the universe's composition.

Key Takeaways:

• The Cardiff University team developed a new method to search for dark matter using gravitational waves, achieving a factor 10,000 improvement over previous world-leading results.
• The analysis focused on subtle changes in the LIGO instrument's mirrors caused by dark matter, leveraging the detector's unprecedented precision in detecting changes smaller than an atomic nucleus.
• The team discovered a new interaction between dark matter and the mirrors, which they simulated using detailed calculations and a novel method for processing the results.
• The breakthrough has the potential to unlock the secrets of dark matter and could lead to a better understanding of the universe's composition.
• The researchers used data from 2019-2020, which will be surpassed by newer data currently being recorded by LIGO.
• The team is working on including more LIGO data in their calculations, aiming to further surpass current limits on ultra-low-mass dark matter.

Statistics:

• 85%: The proportion of dark matter that makes up the universe's mass.
• 10,000: The factor increase in improvement over previous results achieved by the Cardiff University team.
• 2019-2020: The time period during which the data used for the analysis was collected.
• 80dB: The equivalent "boost in sensitivity" achieved by the researchers, comparable to hearing a whisper in a rock concert.

Sources:

• Cardiff University, "Using Gravitational-Wave Detectors to Help Solve the Biggest Mystery in Physics and Astronomy" (press release), dated September 13.
• Physical Review Letters, "Searching for scalar field dark matter with LIGO" (article), JOURNAL: Physics.aps.org, https://physics.aps.org/articles/v17/s101.