ÖsNN = 130 GeV
ÖsNN = 56 GeV
1.31
±0.04±0.05
Ratio
(density per participant pair)
3.24
±0.10±0.25
2.47
±0.10±0.25
dN/dh | |h|<1
per participant pair
555
±12(stat)
±35(syst)
408
±12(stat)±30(syst)
dN/dh | |h|<1
Measurable
Energy
Measurement:
Charged
Particle Multiplicity Near Mid-Rapidity
•for
the 6% most central events
• at two collision energies
• ratio of ÖsNN = 130
GeV/56
GeV
Elements
for measurement:
•Triggering
•Centrality, vertex
•Silicon Counting
Phys. Rev. Lett. 85 3100(2000)
Results