Physics – High Energy Physics – High Energy Physics - Experiment
Scientific paper
2011-01-04
Physics
High Energy Physics
High Energy Physics - Experiment
6 pages, 8 figures, to appear in the proceedings of the 19th International Spin Physics Symposium (SPIN 2010), Juelich, German
Scientific paper
The cross section and double-helicity asymmetry for production of non-identified positive and negative charged hadrons at midrapidity in p+p collisions at sqrt(s) = 62.4 GeV have been measured by the PHENIX experiment at the Relativistic Heavy Ion Collider (RHIC) for a transverse momentum range of 0.5-4.5 GeV/c. The cross section measurements are compared to next-to-leading order and next-to-leading log perturbative QCD calculations, providing information on the applicability of these calculation techniques in the measured kinematic range. The double-helicity asymmetry measurement at this moderate energy provides sensitivity to Delta G, the gluon spin contribution to the spin of the proton, up to modestly larger values of the gluon momentum fraction than previous RHIC measurements at 200 GeV.
Aidala Christine A.
PHENIX Collaboration
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