Double Helicity Asymmetry in Inclusive Mid-Rapidity neutral pion Production for Polarized p+p Collisions at sqrt(s)=200 GeV

Simple item page
dc.creatorthe PHENIX Collaboration
dc.creatorAdler, S.
dc.date2004-04-21
dc.date.accessioned2026-07-07T11:57:51Z
dc.date.available2026-07-07T11:57:51Z
dc.descriptionWe present a measurement of the double longitudinal spin asymmetry in inclusive pi^0 production in polarized proton-proton collisions at sqrt(s)=200 GeV. The data were taken at the Relativistic Heavy Ion Collider with average beam polarizations of 26%. The measurements are the first of 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 mid-rapidity, where next-to-leading order perturbative quantum chromodynamic (NLO pQCD) calculations describe the unpolarized cross section well. The observed asymmetry is small and is compared with a NLO pQCD calculation with a range of polarized gluon distributions.
dc.description326 authors, 6 pages text, RevTeX, 3 figures, 1 table. To be submitted to PRL. Plain text data tables for the points plotted in figures for this and previous PHENIX publications are (or will be) publicly available at http://www.phenix.bnl.gov/papers.html
dc.identifierhttps://arxiv.org/abs/hep-ex/0404027
dc.identifierhttp://arxiv.org/abs/hep-ex/0404027
dc.identifierPhys.Rev.Lett.93:202002,2004
dc.identifierdoi:10.1103/PhysRevLett.93.202002
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/206025
dc.subjectHigh Energy Physics - Experiment
dc.titleDouble Helicity Asymmetry in Inclusive Mid-Rapidity neutral pion Production for Polarized p+p Collisions at sqrt(s)=200 GeV
dc.typetext

Files

Collections

arXiv