Color-octet mechanism and J/psi polarization at LEP
Abstract
Polarized heavy quarkonium productions in Z0 decays are considered. We find that polarizations of the produced quarkonia are independent of that of the parent Z0 provided that one considers the energy distribution or the total production rate. Produced J/psi's via the color-octet and the color- singlet mechanisms are expected to be 19% and 29% longitudinally polarized, respectively. The energy dependence of eta1,8(x)=dGamma1,8Ldx /dGamma1,8d x is very sensitive to the production mechanism, and therefore the measurement of η(x)exp will be an independent probe of the color-octet mechanism.
Turn this paper into a full lesson
ArcXiv compiles a staged curriculum from this paper: 8-12 lessons across beginner → advanced, synthesised section guides, visuals, flashcards, a quiz, exercises, and on-demand deep dives per section. Grounded in the abstract, never invented.