This is an analysis of ~211 million pAu STAR triggers compared to ~52% of the pp transverse data (82% of the data beyond iteration 8);

Plotted on the left are the pi0 A_N for pp in blue and pAu in red; on the right in green is the ratio of A_N for pAu to pp

The data are shown vs E and pT; when plotted vs. E, the data are binned in 4 different regions in pT and vice versa, where the ranges are defined as:

• any pT: 0 < pT < 10
• low pT: 0 < pT < 3.33
• mid pT: 3.33 < pT < 6.66
• high pT: 6.66 < pT < 10
•  
• any E: 0 < xF < 1
• low E: 0 < xF < 1/3
• mid E: 1/3 < xF < 2/3
• high E: 2/3 < xF < 1

** there is also a minimum E and pT cut of 10 and 1 GeV, respectively, for all bins and events considered

** polarisation measurements were obtained from http://www.phy.bnl.gov/cnipol/fills/?rp=15&fn=&ft=&be=&mode=11&sb=Select

These are for pi0 events with the usual cuts with 100mr isolation

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