The PHOBOS Multiplicity array
-0.55 m
-5.04 m
-2.34 m
-1.13 m
0.55 m
1.13 m
2.34 m
5.04 m
z
h < 5.3
-5.3 < h
-3.1 << 3.1
85% of 4p covered
Charged part. multiplicity d2N/dhdj (j is azimuthal angle to beam) Dh= 0.1 and Dj =p/4
Distinguish multiple hits by the energy deposition
PHOBOS @ RHIC
Note:
Pseudorapidity h defined as
h = -ln(tan(q/2))
q polar angle with
respect to beam
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