Adler, S. S. ; Kapoor, S. S. ; et., al (2004) Double helicity asymmetry in inclusive midrapidity π0 production for polarized p+p collisions at √s=200 GeV Physical Review Letters, 93 (20). 202002_1-202002_62004. ISSN 0031-9007
Full text not available from this repository.
Official URL: http://prl.aps.org/abstract/PRL/v93/i20/e202002
Related URL: http://dx.doi.org/10.1103/PhysRevLett.93.202002
Abstract
We present a measurement of the double longitudinal spin asymmetry in inclusive π0 production in polarized proton-proton collisions at √s=200 GeV. The data were taken at the Relativistic Heavy Ion Collider with average beam polarizations of 0.27. The measurements are the first in a program to study the longitudinal spin structure of the proton, using strongly interacting probes, at collider energies. The asymmetry is presented for transverse momenta 1-5 GeV/c at midrapidity, where next-to-leading-order perturbative quantum chromodynamic (NLO pQCD) calculations well describe the unpolarized cross section. The observed asymmetry is small and is compared to a NLO pQCD calculation with a range of polarized gluon distributions.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to The American Physical Society. |
| ID Code: | 93908 |
| Deposited On: | 29 Jun 2012 13:06 |
| Last Modified: | 29 Jun 2012 13:06 |
Repository Staff Only: item control page
