Title

Forward Neutral-Pion Transverse Single-Spin Asymmetries in p Plus p Collisions at s=200 GeV

Authors

David Grosnick, Valparaiso University
Donald D. Koetke, Valparaiso University
Robert Manweiler, Valparaiso University
Shirvel Stanislaus, Valparaiso University
J. C. Webb, Valparaiso University
STAR Collaboration

Document Type

Article

Publication Date

11-2008

Abstract

We report precision measurements of the Feynman x (x(F)) dependence, and first measurements of the transverse momentum (p(T)) dependence, of transverse single-spin asymmetries for the production of pi(0) mesons from polarized proton collisions at s=200 GeV. The x(F) dependence of the results is in fair agreement with perturbative QCD model calculations that identify orbital motion of quarks and gluons within the proton as the origin of the spin effects. Results for the p(T) dependence at fixed x(F) are not consistent with these same perturbative QCD-based calculations.

Recommended Citation

Grosnick, David; Koetke, Donald D.; Manweiler, Robert; Stanislaus, Shirvel; Webb, J. C.; and STAR Collaboration, "Forward Neutral-Pion Transverse Single-Spin Asymmetries in p Plus p Collisions at s=200 GeV" (2008). Physics and Astronomy Faculty Publications. 93.
https://scholar.valpo.edu/phys_astro_fac_pub/93