Physics – Nuclear Physics – Nuclear Experiment
Scientific paper
2011-06-28
Physics
Nuclear Physics
Nuclear Experiment
4 pages, 5 figures, XIX International Workshop on Deep-Inelastic Scattering and Related Subjects (DIS 2011)
Scientific paper
At RHIC kinematics, polarized jet hadroproduction is dominated by $gg$ and $qg$ scattering, making the jet double longitudinal spin asymmetry, $A_{LL}$, sensitive to gluon polarization in the nucleon. I will present STAR results of $A_{LL}$ from inclusive jet measurements for the RHIC 2006 run at center-of-mass energy 200 GeV. I will also discuss the current status of the analysis of data from the 2009 run, also at center-of-mass energy 200 GeV. The results are compared with theoretical calculations of $A_{LL}$ based on various models of the gluon density in the nucleon. The STAR data place significant constraints on allowed theoretical models.
Djawotho Pibero
for the STAR Collaboration
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