Cross Sections and Transverse Single-Spin Asymmetries in Forward Neutral Pion Production from Proton Collisions at sqrt(s)=200 GeV
J. Adams et al., Phys. Rev. Lett. 92 , 171801 (2004).

Figure 2: Invariant Differential Cross Sections for π0 production.

π0 selected to have 3.4 < η < 4.0, giving < η > = 3.8. Statistical and point-to-point systematic uncertainties are listed. The normalization uncertainty (Eπ independent) is 17%.

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bin limits [GeV] <E_pi> [GeV] E d3σ/d3p [μb c3/GeV2] (+/- stat +/- sys)
30-3532.210.801 +/- 0.123 +/- 2.394
35-4037.13.683 +/- 0.064 +/- 0.663
40-4542.11.004 +/- 0.028 +/- 0.158
45-5047.10.342 +/- 0.015 +/- 0.066
50-5551.90.084 +/- 0.006 +/- 0.021

Figure 3: Analyzing powers

Statistical and point-to-point systematic uncertainties are listed. Absolute normalization comes from the CNI polarimeter, assumed to have ANCNI = 0.013.

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Open points (total energy in PFPD)
bin limits [xF] <xF> AN (+/- stat +/- sys)
0.150-0.2000.180.010 +/- 0.005 +/- 0.019
0.200-0.2650.230.003 +/- 0.006 +/- 0.015
0.265-0.3300.29-0.021 +/- 0.009 +/- 0.015
0.330-0.4000.360.039 +/- 0.015 +/- 0.019
0.400-0.4750.430.093 +/- 0.030 +/- 0.016
0.475-0.5550.500.218 +/- 0.065 +/- 0.015
0.555-0.8000.600.176 +/- 0.137 +/- 0.015
Closed points (identified pi-zero mesons).
3.3 < η < 4.1
bin limits [xF] <xF> AN (+/- stat +/- sys)
0.150-0.2000.180.016 +/- 0.010 +/- 0.024
0.200-0.2650.23-0.024 +/- 0.008 +/- 0.015
0.265-0.3300.290.005 +/- 0.012 +/- 0.013
0.330-0.4000.360.048 +/- 0.022 +/- 0.025
0.400-0.4750.430.115 +/- 0.044 +/- 0.038
0.475-0.5550.500.357 +/- 0.087 +/- 0.075
0.555-0.8000.590.080 +/- 0.193 +/- 0.005

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