Constraint on Δg(x) from π^0 production at RHIC
Abstract
Description
We determine the polarized gluon distribution Δg(x) by a global analysis using current DIS and π^0 asymmetry data. The π^0 data from RHIC-Spin experiments provide a strong constraint on Δg(x), so that its uncertainty is reduced. However, a sign problem appears in the analysis using π^0 data, which means that positive and negative distributions are allowed for Δg(x). These two types of solutions are discussed.
4 pages, 4 eps figures, to be published in AIP proceedings of the 17th International Spin Physics Symposium (SPIN2006), Oct. 2-7, 2006, Kyoto, Japan
4 pages, 4 eps figures, to be published in AIP proceedings of the 17th International Spin Physics Symposium (SPIN2006), Oct. 2-7, 2006, Kyoto, Japan