PHOBOS Trigger & Event Selection
Min. Bias Trigger
Very loose coincidence of paddle counters (38ns)
Attempt to trigger all collisions
Event selection
1.Good paddle timing (Dtɠns)
2. Good ZDC timing (Dtងns) OR
3. Large paddle signal
Negative Paddles
Positive Paddles
ZDC N
ZDC P
Au
Au
PP
PN
3<|h|ɜ.5
16 counters
dN/dh
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