Cu+Cu 200 GeV data antiparticle to particle ratios (1-Sigma) statistical and systematic error. Pions Npart Ratios Stat Sys 108 1.01 0.003 0.03 101 0.98 0.003 0.03 91 0.99 0.003 0.03 79 0.98 0.003 0.03 67 0.99 0.003 0.03 57 0.99 0.004 0.03 48 0.98 0.004 0.04 40 0.99 0.005 0.04 33 1 0.005 0.04 27 0.95 0.006 0.04 Kaons Npart Ratios Stat Sys 108 0.98 0.012 0.02 101 0.98 0.012 0.02 91 0.99 0.013 0.02 79 0.97 0.014 0.02 67 0.97 0.016 0.02 57 0.99 0.018 0.02 48 0.96 0.019 0.04 40 1.01 0.023 0.04 33 0.99 0.025 0.04 27 0.95 0.029 0.04 Protons Npart Ratios Stat Sys 108 0.78 0.013 0.04 101 0.77 0.013 0.04 91 0.77 0.014 0.04 79 0.75 0.015 0.04 67 0.78 0.016 0.04 57 0.79 0.018 0.04 48 0.77 0.019 0.05 40 0.78 0.021 0.05 33 0.79 0.024 0.05 27 0.81 0.028 0.05