Effect of possible stronger neutrino interaction at Eνμ∼1011 GeV upon the extraction of sin2θW from the neutral-current cross section at NuTeV

The possibility exists that cosmic-ray neutrinos with energies of ∼1020 eV interact in the atmosphere with a cross section at the millibarn level, giving rise to some of the highest-energy air showers. In a specific dynamical model which can give rise to such a cross section, we show that there can be a small effect upon the extraction of the effective value of sin2θW from νμ–hadron, neutral-current cross section data at NuTeV.