Nab: Measurement principles, apparatus and uncertainties

Dinko Počanić, Ricardo Alarcon, L. P. Alonzi, S. Baeßler, S. Balascuta, J. D. Bowman, M. A. Bychkov, J. Byrne, J. R. Calarco, V. Cianciolo, C. Crawford, E. Frlež, M. T. Gericke, G. L. Greene, R. K. Grzywacz, V. Gudkov, F. W. Hersman, A. Klein, J. Martin, S. A. PageA. Palladino, S. I. Penttilä, K. P. Rykaczewski, W. S. Wilburn, A. R. Young, G. R. Young

Research output: Contribution to journalArticle

47 Scopus citations

Abstract

The Nab collaboration will perform a precise measurement of a, the electron-neutrino correlation parameter, and b, the Fierz interference term in neutron beta decay, in the Fundamental Neutron Physics Beamline at the SNS, using a novel electric/magnetic field spectrometer and detector design. The experiment is aiming at the 10- 3 accuracy level in Δ a / a, and will provide an independent measurement of λ = GA / GV, the ratio of axial-vector to vector coupling constants of the nucleon. Nab also plans to perform the first ever measurement of b in neutron decay, which will provide an independent limit on the tensor weak coupling.

Original languageEnglish (US)
Pages (from-to)211-215
Number of pages5
JournalNuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Volume611
Issue number2-3
DOIs
StatePublished - Dec 1 2009

Keywords

  • Correlations
  • Neutron beta decay
  • Precision measurement

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Instrumentation

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    Počanić, D., Alarcon, R., Alonzi, L. P., Baeßler, S., Balascuta, S., Bowman, J. D., Bychkov, M. A., Byrne, J., Calarco, J. R., Cianciolo, V., Crawford, C., Frlež, E., Gericke, M. T., Greene, G. L., Grzywacz, R. K., Gudkov, V., Hersman, F. W., Klein, A., Martin, J., ... Young, G. R. (2009). Nab: Measurement principles, apparatus and uncertainties. Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 611(2-3), 211-215. https://doi.org/10.1016/j.nima.2009.07.065