Directed Flow of Identified Particles in Au+Au Collisions at $\sqrtsNN = 200$ GeV at RHIC

arXiv: 1112.3930

Phys. Rev. Lett 108, 202301 (2012)

Fig. 1

Charged Pion and K_s⁰ v₁(y), 10%-70% centrality :

Rapidity	Charged Pion v₁ (%)	K_s⁰ v₁ (%)
-0.74	0.19 +/- 0.01	0.19 +/- 0.03
-0.45	0.12 +/- 0.01	0.05 +/- 0.02
-0.15	0.03 +/- 0.01	-0.02 +/- 0.02
0.15	-0.04 +/- 0.01	-0.08 +/- 0.02
0.45	-0.15 +/- 0.01	-0.07 +/- 0.02
0.74	-0.20 +/- 0.01	-0.11 +/- 0.03

Charged Kaon v₁(y), 10%-70% centrality:

Rapidity	Charged Kaon v₁ (%)
-0.46	0.05 +/- 0.12
-0.29	-0.03 +/- 0.06
-0.10	-0.07 +/- 0.05
0.10	-0.06 +/- 0.05
0.29	-0.05 +/- 0.06
0.46	0.04 +/- 0.11

Proton and AntiProton v₁(y), 10%-70% centrality:

Rapidity	Proton v₁ (%)	AntiProton v₁ (%)
-0.65	0.093 +/- 0.120	0.193 +/- 0.136
-0.49	0.129 +/- 0.046	0.183 +/- 0.055
-0.30	-0.010 +/- 0.039	0.175 +/- 0.047
-0.10	0.014 +/- 0.038	0.013 +/- 0.045
0.10	0.024 +/- 0.038	-0.063 +/- 0.045
0.30	-0.066 +/- 0.039	-0.058 +/- 0.046
0.49	-0.065 +/- 0.046	-0.313 +/- 0.054
0.65	-0.210 +/- 0.112	-0.286 +/- 0.127

Fig. 2

Pion v₁(y), 10%-70% centrality:

Rapidity	Pion v₁ (%)
-0.95	0.22 +/- 0.03
-0.85	0.23 +/- 0.02
-0.75	0.19 +/- 0.01
-0.65	0.15 +/- 0.01
-0.55	0.15 +/- 0.01
-0.45	0.12 +/- 0.01
-0.35	0.09 +/- 0.01
-0.25	0.05 +/- 0.01
-0.15	0.04 +/- 0.01
-0.05	0.01 +/- 0.01
0.05	-0.03 +/- 0.01
0.15	-0.03 +/- 0.01
0.25	-0.06 +/- 0.01
0.35	-0.11 +/- 0.01
0.45	-0.15 +/- 0.01
0.55	-0.17 +/- 0.01
0.65	-0.16 +/- 0.01
0.75	-0.22 +/- 0.01
0.85	-0.23 +/- 0.02
0.95	-0.32 +/- 0.03

Proton v1 in this figure is the same as in Fig.1

Fig. 3

Charged pions, protons and antiprotons v₁(y) slope (dv₁/dy) at midrapidity as a function of centrality.

Centrality(%)	Proton v₁(y) slope (%)	AntiProton v₁(y) slope (%)	Charged Pion v₁(y) slope (%)
2.2	0.05 +/- 0.24	0.16 +/- 0.29	-0.07 +/- 0.05
7.2	-0.08 +/- 0.15	-0.60 +/- 0.18	-0.20 +/- 0.03
14.5	-0.04 +/- 0.09	-0.42 +/- 0.11	-0.26 +/- 0.02
24.5	-0.05 +/- 0.09	-0.51 +/- 0.11	-0.29 +/- 0.02
34.5	-0.23 +/- 0.11	-0.43 +/- 0.13	-0.31 +/- 0.02
44.5	-0.45 +/- 0.13	-0.58 +/- 0.16	-0.33 +/- 0.03
54.5	-0.38 +/- 0.18	-0.57 +/- 0.21	-0.25 +/- 0.04
64.5	-1.02 +/- 0.29	-0.43 +/- 0.33	-0.32 +/- 0.07
74.5	-1.20 +/- 0.47	-1.27 +/- 0.51	-0.21 +/- 0.11

Fig. 4

Proton v₁(y') slope (dv₁/dy') at midrapidity as a function of center of mass collision energy, where y'=y/y_beam.

Energy	Slope
2.64 (E895)	0.31 +/- 0.005
3.29 (E895)	0.19 +/- 0.005
3.82 (E895)	0.12 +/- 0.006
4.28 (E895)	0.06 +/- 0.005
8.86 (NA49)	0.001 +/- 0.015
17.3 (NA49)	-0.018 +/- 0.009
200.0 (STAR)	-0.005 +/- 0.011

For any questions please contact STAR Physics Analysis Coordinator : Xin Dong - XDong@lbl.gov