Measurement of the double longitudinal spin asymmetry in inclusive jet production in polarized p+p collisions at sqrt(s) = 200 GeV

Abstract

We present preliminary results for the first measurements of the double longitudinal spin asymmetry A_LL in inclusive jet production at mid-rapidity in polarized proton-proton collisions at sqrt(s) = 200 GeV. The data amount to ~ 0.5 pb-1 collected at RHIC in 2003 and 2004 with beam polarizations up to 45%. The jet transverse energies are in the range of 5 < pT < 17 GeV/c. The data are consistent with theoretical evaluations using deep-inelastic scattering parametrizations for gluon polarization in the nucleon, and tend to disfavor large positive values of gluon polarization.

4 pages, 1 figure. To appear in the proceedings of the Particles and Nuclei International Conference (PANIC05), October 24-28, 2005 Santa Fe, NM, USA; Corrected figure

Cited by in corpus (6)

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• Comparative analysis of the transversities and the longitudinally polarized distribution functions of the nucleon
• Phenomenological analysis of the nucleon spin contents and their scale dependence
• More on the relation between the two physically inequivalent decompositions of the nucleon spin and momentum
• Gauge Invariant Descriptions of Gluon Polarizations Revisited