Measurement of Parity Nonconservation in the Proton-Proton Total Cross Section at 800 MeV

Abstract

We report a measurement of parity nonconservation in the transmission of 800-MeV longitudinally polarized protons through an unpolarized, 1-m liquid-hydrogen target. The dependence of transmission on beam properties was studied to measure and to correct for systematic errors. The measured longitudinal asymmetry in the total cross section is ${A}_{L}=[+2.4\ifmmode\pm\else\textpm\fi{}1.1(\mathrm{statistical})\ifmmode\pm\else\textpm\fi{}0.1(\mathrm{systematic})]\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}7}$.