Fundamental weak interaction studies using polarised nuclei and ion traps |
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Authors: | N Severijns J Deutsch D Beck M Beck B Delauré T Phalet R Prieels P Schuurmans B Vereecke S Versyck |
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Institution: | (1) Instituut voor Kern- en Stralingsfysica, Katholieke Universiteit Leuven, B-3001 Leuven, Belgium;(2) Institut de Physique Nucléaire, UniversitéCatholique de Louvain, B-1348 Louvain-la-Neuve, Belgium |
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Abstract: | Two experiments to search for new physics beyond the standard model for electroweak interactions by measuring correlations
between different spin and momentum vectors in nuclear β-decay are discussed. In the first experiment the correlation between
the emission asymmetry and the longitudinal polarisation of positrons emitted by polarised nuclei is determined. This type
of measurement is sensitive to the presence of right-handed currents but also to possible scalar and tensor-type currents
in the weak interaction. The aim of the second experiment is to determine the βν-correlation in β-decay by measuring the energy
spectrum of the recoil ions, using a Penning trap and a retardation spectrometer. In this case the focus is on the search
for scalar currents in the weak interaction. The results of the experiments presented here are complementary to results from
experiments in muon decay and at high-energy colliders.
This revised version was published online in July 2006 with corrections to the Cover Date. |
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Keywords: | nuclear β -decay correlations right-handed currents scalar and tensor currents polarized nuclei Penning traps |
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