Double Helicity Asymmetry and Cross Section for eta Production in Polarized pp Collisions at PHENIX

Details Double Helicity Asymmetry and Cross Section for eta Production in Polarized pp Collisions at PHENIX Double Helicity Asymmetry and Cross Section for eta Production in Polarized pp Collisions at PHENIX

2006-12-13

arxiv.org/abs/hep-ex/0612031v1

AIPConf.Proc.915:363-366,2007

Physics

High Energy Physics

High Energy Physics - Experiment

4 pages, 2 figures. To appear in the proceedings of the 17th International Spin Physics Symposium (SPIN 2006), Kyoto, Japan, 2

Scientific paper

10.1063/1.2750797

Measurements of double helicity asymmetries for inclusive hadron production in polarized proton-proton collisions are sensitive to spin-dependent parton distribution functions, in particular to the gluon distribution, Delta g. This study presents the double helicity asymmetry and the cross section for eta production. The cross section measurement yields valuable data for the extraction of the fragmentation functions, which are unknown at present but are a prerequisite for the extraction of the spin-dependent parton distribution functions.

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