Double Longitudinal Spin Asymmetry in Neutral Pion Production in Polarized p+p Collisions at {radical}(s) = 200 GeV at PHENIX

Journal Article · Wed Jun 13 00:00:00 EDT 2007 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.2750790· OSTI ID:21061908

Boyle, Kieran ^[1]

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1. Department of Physics and Astronomy, Stony Brook University, Stony Brook, NY, 11794 (United States)

A major goal of the RHIC spin program is to measure {delta}g, the gluon contribution to the proton's spin. Measurements by PHENIX of the double longitudinal spin asymmetry, ALL, of the neutral pion production at mid-rapidity in polarized proton collisions have been shown to constrain {delta}g. Results from the 2005 RHIC run, as well as high pT data from the 2006 RHIC run, are presented. The results disfavor maximal positive and negative values of {delta}g. A measurement of azimuthally independent double transverse spin asymmetry, ATT, is also presented.

• OSTI ID: 21061908
• Journal Information: AIP Conference Proceedings, Vol. 915, Issue 1; Conference: 17. international spin physics symposium, Kyoto (Japan), 2-7 Oct 2006; Other Information: DOI: 10.1063/1.2750790; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA). PHENIX Collaboration; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ASYMMETRY
BROOKHAVEN RHIC
GEV RANGE
GLUONS
INCLUSIVE INTERACTIONS
MULTIPARTICLE SPECTROMETERS
PARTICLE IDENTIFICATION
PARTICLE PRODUCTION
PARTICLE RAPIDITY
PARTICLE STRUCTURE
PIONS NEUTRAL
POLARIZATION
PROTON-PROTON INTERACTIONS
PROTONS
SPIN