Recent Longitudinal Spin Asymmetry Measurements for Inclusive Jet Production at STAR

Abstract

We present measurements of the longitudinal spin asymmetry, $A_{LL}$, for the inclusive jet signal at STAR. The data presented here are mid-rapidity jets in the transverse momentum range of $5<pT<35$ GeV/c and come from polarized proton-proton collisions at center of mass energies of $\sqrt{s}=200$ GeV. We compare our measured $A_{LL}$ values to predictions derived from various parameterizations of the polarized gluon distribution function. The results are shown to provide significant constraints for allowable gluon parameterizations within the measurement's kinematic Bjorken-x range of $0.03<x<0.3$.

3 pages, 4 figures, to appear in PANIC 2008 Proceedings, Nuclear Physics A special issue

References in corpus (6)

• High-Energy-Physics Event Generation with PYTHIA 6.1
• Models for the Polarized Parton Distributions of the Nucleon
• Global Analysis of Helicity Parton Densities and Their Uncertainties
• Prospects for Spin Physics at RHIC
• Longitudinal double-spin asymmetry and cross section for inclusive jet production in polarized proton collisions at sqrt(s) = 200 GeV
• Run II Jet Physics: Proceedings of the Run II QCD and Weak Boson Physics Workshop