2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/168042Measurements 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 function. This study focuses on double helicity asymmetries in eta and charged pion production at mid-rapidity, as well as on the eta cross section and fragmentation functions.4 pages, 5 figures, Proceedings of the 16th International Workshop on Deep-Inelastic Scattering (DIS 2008), London, UK, 7-11 April 2008High Energy Physics - Experimenttext