Test of time reversal invariance in p-p elastic scattering at 198.5 MeV

Abstract
A precise measurement of the polarization-analyzing power difference in p-p elastic scattering has been made at 198.5 MeV to improve the experimental limits on time reversal violation in proton-proton scattering in this energy region. The experiment was performed in a kinematic regime where sensitivities to time reversal violating amplitudes should be high. Experimental methods which eliminated the need to refer to absolute values of the beam polarization or to the analyzing power of a polarimeter were used. The result is (P-A)=0.0047 with a statistical uncertainty of ±0.0025 and a systematic uncertainty of ±0.0015.