期刊
JOURNAL OF HIGH ENERGY PHYSICS
卷 -, 期 8, 页码 -出版社
SPRINGER
DOI: 10.1007/JHEP08(2010)130
关键词
Lepton-Nucleon Scattering
资金
- RBRC
- Desy management
- FWO-Flanders and IWT, Belgium
- Natural Sciences and Engineering Research Council of Canada
- National Natural Science Foundation of China
- Alexander von Humboldt Stiftung
- German Bundesministerium fur Bildung und Forschung (BMBF)
- Deutsche Forschungsgemeinschaft (DFG)
- Italian Istituto Nazionale di Fisica Nucleare (INFN)
- MEXT
- JSPS
- G-COE of Japan
- Dutch Foundation for Fundamenteel Onderzoek der Materie (FOM)
- U.K. Engineering and Physical Sciences Research Council
- Science and Technology Facilities Council
- Scottish Universities Physics Alliance
- U.S. Department of Energy (DOE)
- National Science Foundation (NSF)
- Russian Academy of Science
- Russian Federal Agency for Science and Innovations
- Ministry of Economy
- Ministry of Education and Science of Armenia
Longitudinal double-spin asymmetries of charged hadrons with high transverse momentum p(T) have been measured in electroproduction using the Hermes detector at HERA. Processes involving gluons in the nucleon have been enhanced relative to others by selecting hadrons with p(T) typically above 1GeV. In this kinematic domain the gluon polarization has been extracted in leading order making use of the model embedded in the Monte Carlo Generator PYTHIA 6.2. The gluon polarization obtained from single inclusive hadrons in the pT range 1GeV < p(T) < 2.5GeV using a deuterium target is Delta g/g(< x >, ) = 0.049 +/- 0.034(stat) +/- 0.010(sys-exp)(-0.099)(+0.126)(sys-models) at a scale = 1.35 GeV2 and < x > = 0.22. For different final states and kinematic domains, consistent values of Delta g/g have been found within statistical uncertainties using hydrogen and deuterium targets.
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