Strange quark asymmetry in the nucleon and the NuTeV anomaly
2004 (English)In: Physical Review D, ISSN 0556-2821, Vol. 70, 111505(R)- p.Article in journal (Refereed) Published
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.
Place, publisher, year, edition, pages
2004. Vol. 70, 111505(R)- p.
IdentifiersURN: urn:nbn:se:uu:diva-73800DOI: doi:10.1103/PhysRevD.70.111505OAI: oai:DiVA.org:uu-73800DiVA: diva2:101710