Longitudinal Double-Spin Asymmetry and Cross Section for Inclusive Jet Production in Polarized Proton Collisions at s=200GeV

B. I. Abelev et al. (STAR Collaboration)
Phys. Rev. Lett. 97, 252001 – Published 18 December 2006

Abstract

We report a measurement of the longitudinal double-spin asymmetry ALL and the differential cross section for inclusive midrapidity jet production in polarized proton collisions at s=200GeV. The cross section data cover transverse momenta 5<pT<50GeV/c and agree with next-to-leading order perturbative QCD evaluations. The ALL data cover 5<pT<17GeV/c and disfavor at 98% C.L. maximal positive gluon polarization in the polarized nucleon.

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  • Received 10 August 2006

DOI:https://doi.org/10.1103/PhysRevLett.97.252001

©2006 American Physical Society

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Vol. 97, Iss. 25 — 22 December 2006

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