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- Alwall, Johan, et al.
(author)
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Strange quark asymmetry in the nucleon and the NuTeV anomaly
- 2004
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In: Physical Review D. - 0556-2821. ; 70, s. 111505(R)-
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Journal article (peer-reviewed)abstract
- The NuTeV anomaly of a nonuniversal value of the fundamental parameter sin2thetaW in the electroweak theory has been interpreted as an indication for new physics beyond the standard model. However, the observed quantity depends on a possible asymmetry in the momentum distributions of strange quarks and antiquarks in the nucleon. This asymmetry occurs naturally in a phenomenologically successful physical model for such parton distributions, which reduces the NuTeV result to only about 2 standard deviations from the standard model.
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