Measurement of the Parity-Violating Longitudinal Single-Spin
Asymmetry for W± Boson Production in Polarized
Proton-Proton Collisions at √s=500 GeV
Phys. Rev.
Lett. 106, 062002 (2011) [6 pages] (arXiv: 1009.0326 )
Figure 3
W+
bin raw +-err
sig +err -err
back +err -err
16.00 72.00 8.49 8.48 18.68
13.10 63.52 9.98 16.64
18.00 48.00 6.93 -0.43 14.41
10.23 48.43 7.52 12.63
20.00 31.00 5.57 1.77
8.78 8.18 29.23 5.99 6.79
22.00 45.00 6.71 24.86
8.49 8.67 20.14 5.49 5.21
24.00 32.00 5.66 18.65
6.74 7.17 13.35 4.41 3.66
26.00 37.00 6.08 28.07
6.64 6.78 8.93 3.00 2.66
28.00 39.00 6.24 32.22
6.70 6.62 6.78 2.18 2.43
30.00 38.00 6.16 32.39
6.44 6.44 5.61 1.85 1.87
32.00 39.00 6.24 34.54
6.48 6.47 4.46 1.69 1.71
34.00 58.00 7.62 53.32
7.81 7.80 4.68 1.69 1.72
36.00 55.00 7.42 52.79
7.50 7.49 2.21 1.08 1.11
38.00 56.00 7.48 55.13
7.51 7.50 0.87 0.52 0.61
40.00 51.00 7.14 49.61
7.18 7.19 1.39 0.81 0.76
42.00 31.00 5.57 28.97
5.69 5.70 2.03 1.21 1.18
44.00 25.00 5.00 24.07
5.04 5.04 0.93 0.63 0.62
46.00 16.00 4.00 16.00
4.00 4.00 0.00 0.10 0.00
48.00 10.00 3.16 8.94
3.32 3.32 1.06 1.02 1.00
50.00 2.00 1.41 1.74
1.44 1.42 0.26 0.17 0.25
52.00 5.00 2.24 4.94
2.24 2.24 0.06 0.12 0.07
54.00 2.00 1.41 2.00
1.41 1.41 0.00 0.00 0.00
56.00 0.00 0.00 -0.10
0.06 0.18 0.10 0.18 0.06
58.00 2.00 1.41 2.00
1.41 1.42 0.00 0.10 0.00
60.00 0.00 0.00 0.00
0.00 0.00 0.00 0.00 0.00
62.00 0.00 0.00 0.00
0.00 0.00 0.00 0.00 0.00
64.00 0.00 0.00 0.00
0.00 0.00 0.00 0.00 0.00
66.00 0.00 0.00 0.00
0.00 0.00 0.00 0.00 0.00
68.00 0.00 0.00 -0.10
0.10 0.10 0.10 0.10 0.10
70.00 1.00 1.00 1.00
1.00 1.00 0.00 0.00 0.00
72.00 0.00 0.00 0.00
0.00 0.00 0.00 0.00 0.00
74.00 0.00 0.00 0.00
0.00 0.00 0.00 0.00 0.00
76.00 0.00 0.00 0.00
0.00 0.00 0.00 0.00 0.00
78.00 0.00 0.00 0.00
0.00 0.00 0.00 0.00 0.00
80.00 0.00 0.00 0.00
0.00 0.00 0.00 0.00 0.00
82.00 0.00 0.00 0.00
0.00 0.00 0.00 0.00 0.00
84.00 0.00 0.00 0.00
0.00 0.00 0.00 0.00 0.00
86.00 0.00 0.00 0.00
0.00 0.00 0.00 0.00 0.00
88.00 0.00 0.00 0.00
0.00 0.00 0.00 0.00 0.00
90.00 0.00 0.00 0.00
0.00 0.00 0.00 0.00 0.00
92.00 0.00 0.00 0.00
0.00 0.00 0.00 0.00 0.00
94.00 0.00 0.00 0.00
0.00 0.00 0.00 0.00 0.00
96.00 0.00 0.00 0.00
0.00 0.00 0.00 0.00 0.00
98.00 0.00 0.00 0.00
0.00 0.00 0.00 0.00 0.00
W-
bin raw +-err
sig +err -err back
+err -err
17.00 62.00 7.87 0.00 9.91
16.47 62.00 14.47 6.02
21.00 35.00 5.92 13.13 7.02
9.10 21.87 6.91 3.77
25.00 22.00 4.69 10.90 5.40
6.40 11.10 4.35 2.68
29.00 24.00 4.90 18.66 5.09
5.20 5.34 1.74 1.37
33.00 28.00 5.29 24.70 5.49
5.51 3.30 1.55 1.45
37.00 33.00 5.74 29.24 5.98
5.98 3.76 1.66 1.65
41.00 30.00 5.48 28.02 5.60
5.61 1.98 1.22 1.18
45.00 9.00 3.00 5.79
3.25 3.25 3.21 1.26 1.25
49.00 4.00 2.00 2.42
2.28 2.29 1.58 1.11 1.10
53.00 1.00 1.00 0.97
1.00 1.00 0.03 0.07 0.04
57.00 3.00 1.73 2.96
1.73 1.74 0.04 0.15 0.01
61.00 0.00 0.00 0.00
0.00 0.00 0.00 0.00 0.00
65.00 0.00 0.00 0.00
0.00 0.00 0.00 0.00 0.00
69.00 0.00 0.00 -0.04 0.04
0.06 0.04 0.06 0.04
73.00 0.00 0.00 0.00
0.00 0.00 0.00 0.00 0.00
77.00 0.00 0.00 0.00
0.00 0.00 0.00 0.00 0.00
81.00 0.00 0.00 0.00
0.00 0.00 0.00 0.00 0.00
85.00 0.00 0.00 0.00
0.00 0.00 0.00 0.00 0.00
89.00 0.00 0.00 0.00
0.00 0.00 0.00 0.00 0.00
93.00 0.00 0.00 0.00
0.00 0.00 0.00 0.00 0.00
97.00 0.00 0.00 0.00
0.00 0.00 0.00 0.00 0.00
Figure 4
Data
AW+_L = -0.27 +/- 0.10 (stat.) +/- 0.02 (syst.) +/- 0.03 (norm.)
AW-_L = 0.14 +/- 0.19 (stat.) +/- 0.02 (syst.) +/- 0.03
(norm.)
for |eta_e | < 1 and 25 < E^e_T < 50 GeV
Theory
eta-bin W+ DNS-K W+
DNS-KKP W+ DSSV08 W+ deFlor DSSV08 W-
DNS-K W- DNS-KKP W- DSSV08 W- deFlor
DSSV08
-1.75 -0.182
-0.169
-0.186
-0.182
0.140
-0.094
0.008 0.011
-1.25 -0.229
-0.223
-0.231
-0.232
0.174
-0.123
-0.012 -0.002
-0.75 -0.267
-0.253
-0.273
-0.279
0.210
-0.120
-0.013 -0.003
-0.25 -0.307
-0.285
-0.314
-0.320
0.243
-0.027
0.040 0.045
0.25
-0.346
-0.317
-0.359
-0.372
0.283
0.158
0.163 0.162
0.75
-0.375
-0.341
-0.398
-0.415
0.335
0.306
0.279 0.288
1.25
-0.389
-0.350
-0.426
-0.452
0.390
0.386
0.366 0.388
1.75
-0.419
-0.320
-0.484
-0.514
0.434
0.426
0.436 0.449
For any questions please contact
STAR Physics Analysis Coordinator : Xin Dong - XDong@lbl.gov