Shadowing corrections and the precise determination of electroweak parameters in neutrino-nucleon scattering

Abstract

<jats:p> A systematic error in the extraction of sin <jats:sup>2</jats:sup>θ<jats:sub>W</jats:sub> from nuclear deep inelastic scattering of neutrinos and antineutrinos arises from higher-twist effects arising from nuclear shadowing. We explain that these effects cause a correction to the results of the recently reported significant deviation from the Standard Model that is potentially as large as the deviation claimed, and of a sign that cannot be determined without an extremely careful study of the data set used to model the input parton distribution functions. </jats:p>