Abstract
Measurements of double-helicity asymmetries in inclusive hadron production in polarized collisions are sensitive to helicity-dependent parton distribution functions, in particular, to the gluon helicity distribution, . This study focuses on the extraction of the double-helicity asymmetry in production (), the cross section, and the cross section ratio. The cross section and ratio measurements provide essential input for the extraction of fragmentation functions that are needed to access the helicity-dependent parton distribution functions.
- Received 1 October 2010
DOI:https://doi.org/10.1103/PhysRevD.83.032001
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