The BaBar particle physics experiment explored the differences between matter and antimatter and whether those differences could explain why the universe contains matter and essentially no antimatter.
View of the BaBar detector (about six meters in diameter) with staff scientist Michael Kelsey analyzing problems during a shutdown of SLAC’s PEP-II electron-positron storage rings.
(Peter Ginter/SLAC National Accelerator Laboratory)
The emeritus physicist was honored for the development of novel detectors that have greatly advanced experiments in particle physics, especially BABAR, which looked into the matter-antimatter imbalance of the universe.
The American Physical Society has recognized both researchers for their leading role in SLAC’s BABAR experiment, which confirmed theorists’ description of how nature treats matter and antimatter differently.