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"Table 9" of "Inclusive double-helicity asymmetries in neutral pion and eta meson production in $\vec{p}+\vec{p}$ collisions at $\sqrt{s}=200$ GeV"
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- PHENIX Collaboration
- Creator
Metadata
- Published
- 2014-01-01
- DOI
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- 10.17182/hepdata.64716.v1/t9
- Publisher
- HEPData
- Creator Name (e-Rad)
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- PHENIX Collaboration
Description
BNL-RHIC. Results are presented from data recorded in 2009 by the PHENIX experiment at the Relativistic Heavy Ion Collider for the double-longitudinal spin asymmetry, ASYM(LL), for PI0 and ETA production in sqrt(s) = 200 GeV polarized pp collisions. Comparison of the PI0 results with different theory expectations based on fits of other published data showed a preference for small positive values of gluon polarization, DELTA(G), in the proton in the probed Bjorken x, XB, range. The effect of adding the new 2009 PI0 data to a recent global analysis of polarized scattering data is given.
The best fit value of the gluon polarization where the uncertainty is that at a chi-squared value of 9 when considering only statistical experimental uncertainties.