A new measurement of the strong nuclear force, which binds protons and neutrons together, confirms previous hints of an uncomfortable truth: We still don’t have a solid theoretical grasp of even the simplest nuclear systems. To test the strong nuclear force, physicists turned to the helium-4 nucleus, which has two protons and two neutrons. When helium nuclei are excited, they grow like an...
![A New Experiment Casts Doubt on the Leading Theory of the Nucleus A New Experiment Casts Doubt on the Leading Theory of the Nucleus](https://search.ai.wiki/wp-content/uploads/2023/06/a-new-experiment-casts-doubt-on-the-leading-theory-of-the-nucleus.webp)