Ratio of Neutral-Current to Charged-Current Cross Sections for Inclusive Neutrino Interactions in Hydrogen

Abstract

The ratio of neutral-current to charged-current cross sections is determined from a sample of events obtained in an exposure of the Fermilab 15-ft hydrogen bubble chamber to a high-energy, horn-focused neutrino beam. For events with three or more prongs and with visible hadron momentum above 10 GeV/c, the ratio is 0.40 \ifmmode\pm\else\textpm\fi{} 0.14. A Monte Carlo calculation assuming the Weinberg-Salam model is used to correct for excluded events, yielding ${R}_{\frac{\mathrm{NC}}{\mathrm{CC}}}=0.48\ifmmode\pm\else\textpm\fi{}0.17$.