Physicists propose new calculation explains gallium anomaly without new particles

Historical context for the puzzle

Scientists first noticed this discrepancy in the mid-1990s before Carlo Giunti clearly defined it in 2007. The problem involves detecting roughly twenty percent fewer electron neutrinos than theory predicts when they hit gallium nuclei. This specific interaction turns a neutron into a proton while creating an electron inside the germanium nucleus.

New mathematical solution proposed

The latest work by Italian physicists agrees with the observed number of captured neutrinos rather than requiring new particles. Their findings appear in Physical Review Letters and address a debate that has lasted for decades. This approach removes the need to assume sterile neutrinos exist to explain the missing data.