Elliptic Flow in Au +Au Collisions at sqrt(snn) = 130 GeV
K.H. Ackermann et al., Phys. Rev. Lett. 86 p. 402-407 (2001).
Centrality Dependence
| Centrality Bin |
nch/nmax low |
nch/nmax mean |
Fraction (%) |
v2 (%) |
epsilon |
| 1 |
0.759 |
0.840 |
6.1 |
1.87 +/- 0.25 |
0.060 |
| 2 |
0.643 |
0.700 |
11.4 |
2.75 +/- 0.26 |
0.125 |
| 3 |
0.529 |
0.584 |
18.1 |
3.49 +/- 0.24 |
0.180 |
| 4 |
0.414 |
0.471 |
25.9 |
4.76 +/- 0.20 |
0.245 |
| 5 |
0.310 |
0.361 |
34.1 |
5.19 +/- 0.24 |
0.300 |
| 6 |
0.207 |
0.252 |
44.9 |
6.10 +/- 0.24 |
0.360 |
| 7 |
0.115 |
0.169 |
58.3 |
6.48 +/- 0.34 |
0.410 |
| 8 |
0.023 |
0.061 |
84.4 |
6.16 +/- 0.66 |
0.420 |
The nch values are the multiplicity of primary tracks with a distance of closest approach to the vertex of < 3 cm and a pseudorapidity between -0.75 and 0.75.
Fraction is the cumulative fraction of events starting with the most central.
The epsilon values are for a Woods-Saxon Wounded Nucleon model and have been transformed to this multiplicity scale using Hijing.
Transverse Momentum Dependence
| pt (MeV/c) |
v2 (%) |
| 150 |
0.76 +/- 0.19 |
| 250 |
1.53 +/- 0.17 |
| 350 |
2.54 +/- 0.17 |
| 450 |
3.88 +/- 0.19 |
| 550 |
4.82 +/- 0.22 |
| 650 |
5.97 +/- 0.24 |
| 750 |
6.58 +/- 0.28 |
| 850 |
7.86 +/- 0.32 |
| 950 |
8.71 +/- 0.36 |
| 1050 |
9.59 +/- 0.41 |
| 1150 |
9.10 +/- 0.46 |
| 1250 |
11.2 +/- 0.5 |
| 1350 |
12.1 +/- 0.6 |
| 1450 |
11.4 +/- 0.7 |
| 1550 |
11.8 +/- 0.8 |
| 1650 |
11.8 +/- 0.9 |
| 1750 |
15.1 +/- 1.0 |
| 1850 |
14.3 +/- 1.1 |
| 1950 |
13.9 +/- 1.3 |
| 2050 |
14.5 +/- 1.5 |