Measurement of the
Centrality Dependence of
Charged Particle Pseudorapidity Density
with the PHOBOS Detector
The PHOBOS Detector
The BIG Picture
Selecting Collisions
Determining Centrality
Uncertainty on Npart
Detector Geometry
Vertex Finding
Tracklet Analysis
Tracklet Systematic Error
Measured dNch/dh
Centrality Dependence of
dNch/dh
Comparison to SPS
Summary