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

A systematic error in the extraction of sin(2) theta(W) 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.