Publication Title

Physical Review Letters

Publication Date

6-13-2008

Document Type

Article

DOI

10.1103/PhysRevLett.100.232003

Keywords

polarized protons, nucleon, photoproduction, pair

Disciplines

Physics

Abstract

We report a new STAR measurement of the longitudinal double-spin asymmetry A(LL) for inclusive jet production at midrapidity in polarized p+p collisions at a center-of-mass energy of root s = 200 GeV. The data, which cover jet transverse momenta 5 < p(T) < 30 GeV/c, are substantially more precise than previous measurements. They provide significant new constraints on the gluon spin contribution to the nucleon spin through the comparison to predictions derived from one global fit to polarized deep-inelastic scattering measurements. They provide significant new constraints on the gluon spin contribution to the nucleon spin through the comparison to predictions derived from one global fit to polarized deep-inelastic scattering measurements.

Comments

Copyright 2008 American Physical Society. Available on publisher's site at http://dx.doi.org/10.1103/PhysRevLett.100.232003


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