Longitudinal Double Spin Asymmetry in Inclusive Jet Production atSTAR

Conference · Tue Aug 15 00:00:00 EDT 2006

OSTI ID:927821

Kowalik, Katarzyna

This contribution reports on the first measurement of the longitudinal double-spin asymmetry A{sub LL} for the inclusive production of jets in polarized proton-proton collisions at {radical}s = 200 GeV. The data were collected with STAR at RHIC in the years 2003 and 2004, and correspond to a sampled integrated luminosity of 0.3 pb{sup -1} with beam polarizations up to 45%. The results on A{sub LL} cover jet transverse momenta 5 < p{sub T} < 17 GeV/c and agree with perturbative QCD evaluations based on deep-inelastic scattering parametrizations for the gluon polarization in the proton. The results disfavor large positive gluon polarization in the polarized proton.

• Research Organization: COLLABORATION - University ofMinnesota
• DOE Contract Number: DE-AC02-05CH11231
• OSTI ID: 927821
• Report Number(s): LBNL-61701; R&D Project: NRNC; BnR: KB0201022; TRN: US0804729
• Resource Relation: Conference: Conference on the Intersections of Particle andNuclear Physics, Puerto Rico, May 30 - June 03,2006
• Country of Publication: United States
• Language: English

Related Subjects

72
ASYMMETRY
GLUONS
LUMINOSITY
NUCLEAR PHYSICS
POLARIZATION
PRODUCTION
QUANTUM CHROMODYNAMICS
SCATTERING
SPIN