"Groundbreaking Experiment Challenges Dominant Nucleus Theory"
A new experiment measuring the strong nuclear force in helium-4 nuclei has revealed a significant discrepancy between theoretical predictions and experimental results. The swelling of the nuclei, which is a crucial factor in understanding nuclear matter and neutron stars, was found to be twice as large as expected. This discrepancy challenges the current leading theory of nuclear interactions, known as chiral effective field theory, and highlights the need for a better understanding of even the simplest nuclear systems. Further research is needed to determine the cause of this discrepancy and improve our understanding of the strong nuclear force.