PHOBOS PRELIMINARY

d+Au 200 GeV  pi-/pi+ and p-bar/protons

Data are integrated over all events accepted by the 
Phobos minimum-bias trigger.  These data are found 
using the TOF detector which requires a valid signal 
from the T0 start counters.  This requirement 
introduces a small centrality bias.

Ratios for Y_lab~0.8 (pions) ~0.6 (protons)
The rapidity range spans about
+/-0.7 (pions) +/-0.5 (protons) at low pT
+/-0.3 (both particles) at high pT
See acceptance plots in G Veres talk for details

   pt     pion    stat    proton  stat
  GeV/c   ratio   error    ratio  error
  ======================================
  0.552  1.030   0.016   0.897   0.049
  0.814  1.023   0.008   0.816   0.014
  1.189  1.019   0.009   0.805   0.014
  1.583  1.018   0.013   0.799   0.020
  1.982  0.981   0.020   0.751   0.032
  2.372  0.992   0.038   0.703   0.059
  ======================================
  systematic errors for all points: +/- 0.07