Recent STAR Results from Neutral Pion Production in Polarized pp Collisions at {radical}(s) = 200 GeV at RHIC

Journal Article · Tue Aug 04 04:00:00 EDT 2009 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.3215644· OSTI ID:21316908

Hoffman, Alan ^[1]

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1. Massachusetts Institute of Technology, 77 Massachusetts Ave. Cambridge, MA 02139 (United States)

A primary goal of the STAR spin physics program is measuring the polarized gluon distribution function, {delta}g(x), accessible through the double longitudinal spin asymmetry, A{sub LL}. The STAR detector is uniquely suited for measuring A{sub LL} in a number of different final-state channels, such as inclusive jet and pion production, in polarized pp collisions. We present preliminary A{sub LL} results from RHIC run 6 for neutral pion production at mid-rapidity. These A{sub LL} measurements allow for discrimination among a number of different next-to-leading order (NLO) perturbative Quantum Chromodynamics (pQCD) predictions and provide meaningful constraints on {delta}g(x)

• OSTI ID: 21316908
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 1149; ISSN 0094-243X; ISSN APCPCS
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ASYMMETRY
BROOKHAVEN RHIC
COLLIDING BEAMS
DISTRIBUTION FUNCTIONS
GEV RANGE
GLUONS
INCLUSIVE INTERACTIONS
JET MODEL
MULTIPARTICLE SPECTROMETERS
PARTICLE IDENTIFICATION
PARTICLE PRODUCTION
PARTICLE RAPIDITY
PIONS NEUTRAL
POLARIZATION
POLARIZED BEAMS
PROTON BEAMS
PROTON-PROTON INTERACTIONS
QUANTUM CHROMODYNAMICS
SPIN