Nab: Measurement Principles, Apparatus and Uncertainties

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...

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Detalles Bibliográficos
Autores principales: Pocanic, Dinko, Alarcon, R., Alonzi, L.P., Baessler, S., Balascuta, S., Bowman, J.D., Bychkov, M.A., Byrne, J., Calarco, J.R., Cianciolo, V., Crawford, C.B., Frlez, E., Gericke, M.T., Greene, G.L., Grzywacz, R.K., Gudkov, Vladimir P., Hersman, F.W., Klein, A., Martin, J., Page, S.A., Palladino, A., Penttila, S.I., Rykaczewski, K.P., Wilburn, W.S., Young, A.R., Young, G.R.
Lenguaje:eng
Publicado: 2008
Materias:
Nuclear Physics
Acceso en línea:https://dx.doi.org/10.1016/j.nima.2009.07.065
http://cds.cern.ch/record/1132318
Descripción
Sumario: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 (Delta a)/a, and will provide an independent measurement of lambda = G_A/G_V, 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.

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