Longitudinal Double-spin Asymmetries for {pi}{sup 0} Production at Forward Rapidity in pp Collisions at {radical}(s) = 200 GeV at STAR

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

DOI:https://doi.org/10.1063/1.3215674· OSTI ID:21316938

Wissink, Scott W ^[1]

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1. Department of Physics and Cyclotron Facility, Indiana University, Bloomington, IN 47408 (United States)

Measurements of the double-spin asymmetry A{sub LL} for inclusive {pi}{sup 0} production in hard pp collisions can provide important constraints on gluonic spin contributions to the proton. The STAR Endcap Electromagnetic Calorimeter is well-suited for these studies, with full azimuthal coverage for pseudorapidities 1.086<{eta}<2, good depth segmentation, and excellent transverse granularity. Details of the {pi}{sup 0} reconstruction algorithms we employed are described. Preliminary results from the 2006 data set for A{sub LL} for {pi}{sup 0,}s at forward rapidities are presented and compared to several NLO pQCD calculations that assume different values for the integral {delta}G.

• OSTI ID: 21316938
• Journal Information: AIP Conference Proceedings, Vol. 1149, Issue 1; Conference: 18. international spin physics symposium, Charlottesville, VA (United States), 6-11 Oct 2008; Other Information: DOI: 10.1063/1.3215674; (c) 2009 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ALGORITHMS
ASYMMETRY
BROOKHAVEN RHIC
COLLIDING BEAMS
GEV RANGE
GLUONS
INCLUSIVE INTERACTIONS
MULTIPARTICLE SPECTROMETERS
PARTICLE IDENTIFICATION
PARTICLE RAPIDITY
PIONS NEUTRAL
POLARIZED BEAMS
PROTON BEAMS
PROTON-PROTON INTERACTIONS
SHOWER COUNTERS
SPIN