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29 March 2024
 
  » arxiv » 0806.0552

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Nuclear isospin mixing and elastic parity-violating electron scattering
O. Moreno ; P. Sarriguren ; E. Moya de Guerra ; J.M. Udias ; T.W. Donnelly ; I. Sick ;
Date 3 Jun 2008
AbstractThe influence of nuclear isospin mixing on parity-violating elastic electron scattering is studied for the even-even, N=Z nuclei 12C, 24Mg, 28Si, and 32S. Their ground-state wave functions have been obtained using a self-consistent axially-symmetric mean-field approximation with density-dependent effective two-body Skyrme interactions. Some differences from previous shell-model calculations appear for the isovector Coulomb form factors which play a role in determining the parity-violating asymmetry. To gain an understanding of how these differences arise, the results have been expanded in a spherical harmonic oscillator basis. Strangeness contributions to the asymmetry are also studied in concert with the isospin mixing contributions. Results are obtained within the distorted-wave Born approximation for comparison with potential future experimental studies of parity-violating electron scattering. To this end, for each nucleus the focus is placed on kinematic ranges where the signal (isospin-mixing effects on the parity-violating asymmetry) and the experimental figure-of-merit are maximized.
Source arXiv, 0806.0552
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