Leah Broussard leads a study of neutron decay to understand correlations between electrons and antineutrinos as well as subtle distortions in the electron energy spectrum. The physicist, who hails from Louisiana, influenced the color scheme of the experiment’s newly installed instrument to reflect her home state’s biggest celebration—its spectrometer sports Mardi Gras green on the magnet, purple on the shielding, and gold inside the magnet and on safety bars.