Dark matter’s secret force does the opposite of what scientists expected
Scientists are investigating a theoretical 'dark force' that may influence how dark matter interacts with itself. This hidden force could explain discrepancies between observed cosmic expansion and current standard cosmological models.
Why it matters
Understanding dark matter is essential for refining our fundamental model of the universe and how galaxies form.
Dark matter is usually described as an invisible substance that responds only to gravity. But scientists are now exploring a more complex possibility: dark matter particles may also interact through a hidden force of their own.
A new study in the Journal of Cosmology and Astroparticle Physics ( JCAP ) examined what would happen if dark matter experienced an additional attractive force. The results were surprisingly counterintuitive. Although the force causes dark matter to gather more efficiently, it usually does not accelerate the growth of cosmic structure. Instead, it tends to slow that growth.
Why Scientists Are Considering a Dark Force
Interest in a possible "dark force" has increased as highly precise observations of the Universe have produced results that do not always align perfectly.
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