1996/10/31 by Adam K. Leibovich · 1 citation
Physics and Astronomy · #Computer science #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph
paper · pdf · doi:10.1103/physrevd.56.4412
published as Phys. Rev. D 56, 4412 (1997) · 10 pages revtex, uses epsf, some formulae corrected
arxiv created 1997/04/25 · openalex publication_date 1997/10/01 · openalex created_date 2016/06/24 · arxiv updated 2016/08/24 · openalex updated_date 2026/08/05
We calculate the polarization of \ensuremathψ^\ensuremath' due to gg\ensuremath→QQ[2S+1LJ(8)]g\ensuremath→\ensuremathψ^(\ensuremathλ) color-octet quarkonia production. We find that at low transverse momenta the \ensuremathψ^\ensuremath' is unpolarized due to the contributions proportional to the L=S=0 and L=S=1 color-octet matrix elements. As p_\ensuremath⊥ increases, the \ensuremathψ^\ensuremath' mesons become 100% polarized, as predicted by fragmentation calculations. Polarization due to lowest-order color-singlet production is also considered, which qualitatively has a similar shape to the color-octet production.