Evidence of Time-Symmetry Violation in the Interaction of Nuclear Particles

Abstract
Measurements of the proton polarization in the reactions Li7(He3,ppol)Be9 and Be9(He3,ppol)B11 and of the analyzing powers of the inverse reactions, initiated by polarized protons at the same c.m. energies, show significant differences which imply the failure of the polarization-analyzing-power theorem and, prima facie, of time-reversal invariance in these reactions.