Two protons and a neutron A discrepancy between two different measurements of the charge radius of the helium-3 nucleus may have been reconciled. (Courtesy: Shutterstock) Independent measurements of ...

The muon mismatch was caused by calculation limits, not a new force. Improved methods bring theory and experiment into close ...

A tiny discrepancy in particle physics has loomed for decades as an exciting possible crack in one of science’s most ...

The 50-foot-wide racetrack used to study muons traveled by barge around Florida and up the Mississippi, and then by truck across Illinois. Reidar Hahn, Fermilab About 50 years ago, physicists came up ...

Nucleon numbers The research team found a new way of calculating the size of atomic nuclei such as the ones represented on this grid. (Courtesy: Serdar Elhatisari) A new way of calculating the size of ...

A major international experiment aimed at measuring Newton’s gravitational constant has produced results that conflict with ...

A major obstacle in calculating the muon’s behavior is the strong force, the most powerful of the four fundamental forces, along with gravity, electromagnetism, and the weak force. It binds quarks ...

When the results of an experiment don’t match predictions made by the best theory of the day, something is off. Fifteen years ago, physicists at Brookhaven National Laboratory discovered something ...

A tiny discrepancy in particle physics has loomed for decades as an exciting possible crack in one of science's most successful theories, hinting at unknown forces or quantum objects. Now, an ...