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Published on: August 6, 2021
Measurement of the Electron-Antineutrino Angular Correlation in Neutron β Decay
G Darius1, W A Byron1, C R DeAngelis1
1Tulane University, New Orleans, Louisiana 70118, USA.
Abstract:
We report the first result for the electron-antineutrino angular correlation (a coefficient) in free neutron β decay from the aCORN experiment. aCORN uses a novel method in which the a coefficient is proportional to an asymmetry in proton time of flight for events where the β electron and recoil proton are detected in delayed coincidence. Data are presented from a 15 month run at the NIST Center for Neutron Research. We obtained a=-0.1090±0.0030(stat)±0.0028(sys), the most precise measurement of the neutron a coefficient reported to date.
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