Terminology: Energy Density
“Size” of spectator
related to
centrality
...measured in
calorimeters?
J. D Bjorken, Phys. Rev. D27, 140 (1983)
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1
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R
t
2
d
E
T
d
y
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1
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R
t
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0
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p
T
2
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m
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2
d
N
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d
y
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