Abstract
I will discuss the most recent measurements of the inclusive jet longitudinal spin asymmetry ALL in polarized proton‐proton collisions. STAR collected its largest data sample thus far, 4.7 pb−1 of integrated luminosity at an average beam polarization of ∼57%, during the 2006 run at a center‐of‐mass energy of 200 GeV. I will also present previous STAR inclusive jet ALL and cross section measurements. The results are compared with theoretical calculations of ALL based on polarized distribution functions in the nucleon with a range of different contributions from the gluon polarization, ΔG. The STAR data place significant constraints on ΔG for 0.02<x<0.3 for the spin of the proton.
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