Longitudinal double-spin asymmetry and cross section for inclusive neutral pion production at midrapidity in polarized proton collisions at √s = 200 GeV - Phys. Rev. D 80 (2009) 111108

1. Cross section for π0 production at midrapidity in p+p collisions at √s = 200 GeV

pT range
(GeV/c)		 pT
(GeV/c)		 Cross section
(mb GeV-2 c3)		 Stat. error
(mb GeV-2 c3)		 Syst. error
(mb GeV-2 c3)
1.0–1.5 1.25 2.59×10-1 1.58×10-2 3.58×10-2
1.5–2.0 1.75 4.83×10-2 3.04×10-3 9.37×10-3
2.0–2.5 2.25 1.19×10-2 8.95×10-4 2.85×10-3
2.5–3.0 2.75 3.64×10-3 3.36×10-4 1.01×10-3
3.0–4.0 3.5 4.38×10-4 8.21×10-5 1.36×10-4
4.0–5.0 4.5 6.72×10-5 5.08×10-6 2.36×10-5
5.0–6.0 5.5 1.40×10-5 8.92×10-7 2.52×10-6
6.0–7.0 6.5 3.73×10-6 2.44×10-7 6.23×10-7
7.0–8.0 7.5 1.18×10-6 6.94×10-8 2.41×10-7
8.0–10.0 9.0 3.08×10-7 1.85×10-8 7.10×10-8
10.0–12.0 11.0 7.92×10-8 5.64×10-9 2.24×10-8
12.0–14.0 13.0 2.13×10-8 2.20×10-9 7.25×10-9
14.0–17.0 15.5 5.11×10-9 7.81×10-10 2.04×10-9

Note: normalization uncertainty of 11.7% is not included.

2. Mean transverse momentum fraction of π0's in their associated jets

pT range
(GeV/c)		 pT
(GeV/c)		 〈z〉 Stat. error Syst. error
4.7–5.7 5.2 0.695 0.004 +0.017/-0.025
5.7–6.7 6.2 0.705 0.004 +0.016/-0.027
6.7–8.0 7.35 0.713 0.005 +0.018/-0.028
8.0–10.0 9.0 0.739 0.007 +0.018/-0.028
10.0–12.0 11.0 0.733 0.012 +0.021/-0.030
12.0–14.0 13.0 0.766 0.019 +0.029/-0.021

3. Longitudinal double-spin asymmetry for inclusive π0 production at midrapidity in p+p collisions at √s = 200 GeV

pT range
(GeV/c)		 pT
(GeV/c)		 ALL Stat. error Syst. error
3.7–4.7 4.17 0.0183 0.0336 0.0160
4.7–6.3 5.41 -0.0191 0.0231 0.0111
6.3–8.2 7.06 0.0092 0.0344 0.0134
8.2–11.0 9.22 -0.0638 0.0637 0.0186

Note: normalization uncertainty of 9.4% is not included.

For any questions please contact STAR Physics Analysis Coordinator Bedangadas Mohanty