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In a new paper, physicists argue that hypothetical particles called axions could explain why the universe isn’t empty.
Physicists have long searched for hypothesized dark matter particles called WIMPs. Now, focus may be shifting to the axion — an ultra-lightweight particle whose existence would solve two mysteries at once.
A new theory proposes that the quantum properties of an object extend into an “atmosphere” that surrounds the material.
The two physicists who introduced Peccei-Quinn symmetry came up with their idea on and around Stanford University’s campus 40 years ago.