Longitudinal Double-Spin Asymmetry and Cross Section for Inclusive Jet Production in Polarized Proton Collisions at s=200GeV
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.
- Publication:
-
Physical Review Letters
- Pub Date:
- December 2006
- DOI:
- 10.1103/PhysRevLett.97.252001
- arXiv:
- arXiv:hep-ex/0608030
- Bibcode:
- 2006PhRvL..97y2001A
- Keywords:
-
- 13.87.Ce;
- 12.38.Qk;
- 13.85.Hd;
- 13.88.+e;
- Production;
- Experimental tests;
- Inelastic scattering: many-particle final states;
- Polarization in interactions and scattering;
- High Energy Physics - Experiment
- E-Print:
- 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/