Gluon polarization measurements with inclusive jets at STAR
Abstract
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.
- Publication:
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arXiv e-prints
- Pub Date:
- June 2011
- DOI:
- 10.48550/arXiv.1106.5769
- arXiv:
- arXiv:1106.5769
- Bibcode:
- 2011arXiv1106.5769D
- Keywords:
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- Nuclear Experiment
- E-Print:
- 4 pages, 5 figures, XIX International Workshop on Deep-Inelastic Scattering and Related Subjects (DIS 2011)