Measurement of the Centrality Dependence of Charge Particle Pseudorapidity Density with the PHOBOS Detector

April 29, 2001

APS Meeting: Washington, DC

Page 9

Tracklet Analysis

Tracklets are two point tracks that are constrained by the event vertex.

|dh| < 0.04 |df| < 0.3

Vertex

Spectrometer

D = Ödh2 + df2

D < 0.015

dh = h1 – h2

df = f1 – f2