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Effect due to charge symmetry violation on the Paschos-Wolfenstein relation

Yong Ding

Bo-Qiang Ma*

  • Department of Physics, Peking University, Beijing 100871, China

  • CCAST (World Laboratory), P. O. Box 8730, Beijing 100080, China
  • Department of Physics, Peking University, Beijing 100871, China†

  • *Electronic address: mabq@phy.pku.edu.cn Corresponding author.
  • †Mailing address.
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Phys. Rev. D 73, 054018 – Published 24 March, 2006

DOI: https://doi.org/10.1103/PhysRevD.73.054018

Abstract

The modification of the Paschos-Wolfenstein relation is investigated when the charge symmetry violations of valence and sea quark distributions in the nucleon are taken into account. We also study qualitatively the impact of charge symmetry violation (CSV) effect on the extraction of sin2θw from deep-inelastic neutrino- and antineutrino-nuclei scattering within the light-cone meson-baryon fluctuation model. We find that the effect of CSV is too small to give a sizable contribution to the NuTeV result with various choices of mass difference inputs, which is consistence with the prediction that the strange-antistrange asymmetry can account for largely the NuTeV deviation in this model. It is noticeable that the effect of CSV might contribute to the NuTeV deviation when the larger difference between the internal momentum scales, αp of the proton and αn of the neutron, is considered.

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Phys. Rev. D 73, 054018– Published 24 March, 2006
  • Received 19 January 2006

© 2006 American Physical Society

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