2011/04/30 by Koichi Kanazawa, Y. Koike, Yuji Koike
Physics and Astronomy · #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph
paper · pdf · doi:10.1103/physrevd.83.114024
published as Phys.Rev.D83:114024,2011 · 12 pages, 8 figures, Final version published in Phys. Rev. D 83, 114024 (2011)
openalex publication_date 2011/06/09 · arxiv created 2011/06/11 · arxiv updated 2011/06/24 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We study the single transverse-spin asymmetry for inclusive light-hadron productions in the proton-proton collision, p^\ensuremath\uparrowp\ensuremath→hX (h=\ensuremathπ, K, \ensuremathη), for the RHIC kinematics based on the twist-3 mechanism in the collinear factorization. The analysis includes all the contributions from the soft-gluon pole and the soft-fermion pole for the twist-3 quark-gluon correlation functions in the transversely polarized proton. After discussing the flavor decomposition and the PT-dependence of the asymmetry obtained in the previous analysis at the center-of-mass energy √(S)=62.4 and 200 GeV, we will give a prediction for the asymmetry at √(S)=500 GeV and also for the \ensuremathη-meson production. We found slightly smaller asymmetry at √(S)=500 GeV for \ensuremathπ^\ifmmode±\else\textpm\fi,0 and K+ compared with those at the lower energies. The asymmetry for the \ensuremathη-meson turned out to be significantly larger than that for \ensuremathπ0.