Longitudinal double-spin asymmetry and cross section for inclusive jet production in polarized proton collisions at sqrt(s) = 200 GeV

2006/08/31 by STAR Collaboration, B. I. Abelev, M. M. Aggarwal +108 · 4 citations
Engineering · Physics and Astronomy · #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #Superconducting Materials and Applications #hep-ex

paper · pdf · doi:10.1103/physrevlett.97.252001

published as Phys.Rev.Lett.97:252001,2006 · 6 pages, 3 figures. Minor changes from review process in Phys. Rev. Lett. Plain text tables of data in STAR publications may be found at http://www.star.bnl.gov/central/publications/

arxiv created 2006/12/20 · openalex publication_date 2008/06/23 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/02

Abstract

We report a measurement of the longitudinal double-spin asymmetry A_LL and the differential cross section for inclusive mid-rapidity jet production in polarized proton collisions at \√(s)=200 GeV. The cross section data cover transverse momenta 5 < pT < 50 GeV/c and agree with next-to-leading order perturbative QCD (NLO pQCD) evaluations. The spin asymmetry data, presented for jets with 5 < pT < 17 GeV/c, disfavor large positive values of gluon polarization in the polarized nucleon.

Citations

• Gluon polarization in the nucleon from quasi-real photoproduction of high-pT hadron pairs

Cited by

• Unquenched quark model for baryons: Magnetic moments, spins, and orbital angular momenta
• Recent results from the STAR spin program at RHIC
• Gluon-Spin Contribution to the Proton Spin from the Double-Helicity Asymmetry in Inclusiveπ0Production in Polarizedp+pCollisions ats=200 GeV
• Longitudinal Double-Spin Asymmetry for Inclusive Jet Production inp→+p→Collisions ats=200 GeV