Djawotho, P. (2013) Gluon polarization and jet production at STAR. Il nuovo cimento C, 36 (5). pp. 35-38. ISSN 1826-9885
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Abstract
At RHIC kinematics, polarized jet hadroproduction is dominated by gg and qg scattering, making the jet longitudinal double-spin asymmetry, ALL, sensitive to gluon polarization in the nucleon. I will present STAR results of ALL from inclusive jet and dijet measurements for the RHIC 2006 run totaling 5.5 pb−1 of integrated luminosity with 55% beam polarization at center-of-mass energy 200GeV. I will also present preliminary results from the analyses of data from the 2009 run, which collected a much larger sample (25 pb−1 with 57% polarization) at 200GeV. The results are compared with theoretical calculations of ALL based on various models of the polarized gluon distribution function in the nucleon. The STAR data place significant constraints on allowed theoretical models.
| Item Type: | Article |
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| Uncontrolled Keywords: | Jets in large-Q2 scattering ; Polarization in interactions and scattering ; Polarization phenomena in reactions ; Quarks, gluons, and QCD in nuclear reactions |
| Subjects: | 500 Scienze naturali e Matematica > 530 Fisica |
| Depositing User: | Marina Spanti |
| Date Deposited: | 06 May 2020 16:10 |
| Last Modified: | 06 May 2020 16:10 |
| URI: | http://eprints.bice.rm.cnr.it/id/eprint/18313 |
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