Analyzing Power in Proton-Nucleus Elastic Scattering at 0.8 GeV

Abstract

The first elastic-scattering analyzing-power (${A}_{y}$) data at 0.8 GeV are presented and discussed. Angular distributions of ${A}_{y}$ over the range 2\ifmmode^\circ\else\textdegree\fi{} to 20\ifmmode^\circ\else\textdegree\fi{} (30\ifmmode^\circ\else\textdegree\fi{} for $^{12}\mathrm{C}$) have been obtained for $^{12}\mathrm{C}$, $^{58}\mathrm{Ni}$, $^{90}\mathrm{Zr}$, and $^{208}\mathrm{Pb}$ using the high-resolution spectrometer at the Clinton P. Anderson Meson Physics Facility. The analyzing powers oscillate sharply over positive values in qualitiative agreement with expectations.