Longitudinal double-spin asymmetry for inclusive jet production in p(pol) + p(pol) collisions at {radical}{ovr s} = 200 GeV.

Journal Article · Tue Jan 01 00:00:00 EST 2008 · Phys. Rev. Lett.

DOI:https://doi.org/10.1103/PhysRevLett.100.232003· OSTI ID:964253

Abelev, B I; Aggarwal, M M; Ahammed, Z; Anderson, B D; Arkhipkin, D; Krueger, K; Spinka, H M; Underwood, D G

We report a new STAR measurement of the longitudinal double-spin asymmetry A{sub LL} for inclusive jet production at midrapidity in polarized p+p collisions at a center-of-mass energy of {radical} = 200 GeV. The data, which cover jet transverse momenta 5 < p{sub 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.

• Research Organization: Argonne National Lab. (ANL), Argonne, IL (United States)
• Sponsoring Organization: USDOE Office of Science (SC); National Science Foundation (NSF); Swiss NSF
• DOE Contract Number: DE-AC02-06CH11357
• OSTI ID: 964253
• Report Number(s): ANL-HEP-PR-09-87; PRLTAO; TRN: US0903664
• Journal Information: Phys. Rev. Lett., Vol. 100, Issue 2008; ISSN 0031-9007
• Country of Publication: United States
• Language: ENGLISH

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ASYMMETRY
GLUONS
NUCLEONS
PRODUCTION
SCATTERING
SPIN