Measurement of the electron-antineutrino correlation in neutron beta decay: aCORN experiment

Authors :: Wietfeldt, F. E.
Byron, W. A.
Darius, G.
DeAngelis, C. R.
Hassan, M. T.
Dewey, M. S.
Mendenhall, M. P.
Nico, J. S.
Collett, B.
Jones, G. L.
Komives, A.
Stephenson, E. J.
Publication Year :: 2018
Abstract: The aCORN experiment uses a novel asymmetry method to measure the electron-antineutrino correlation (a-coefficient) in free neutron decay that does not require precision proton spectroscopy. aCORN completed two physics runs at the NIST Center for Neutron Research. The first run on the NG-6 beam line in 2013--2014 obtained the result a = 0.1090 +/- 0.0030 (stat) +/- 0.0028 (sys), a total uncertainty of 3.8%. The second run on the new NG-C high flux beam line promises an improvement in precision to <2%.<br />Comment: Talk presented at CIPANP2018. 9 pages, LaTeX, 4 pdf figures

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