CERN finds gluons behaving strangely deep inside atomic nuclei
Summary
Using the ALICE experiment at the Large Hadron Collider, physicists measured particle production inside atomic nuclei at distances as small as roughly one-quarter of a proton. They found a sharp decline in J/ψ production at the smallest scales, a result that conventional nuclear shadowing does not easily explain and that helps distinguish competing accounts of gluon behavior.
The suppression at subproton scales is the decisive shift because it exposes structure that broader
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The result probes how the strong force organizes matter at its smallest scales and could reshape calculations used across nuclear and particle physics.