Color-octet mechanism and J/ψ polarization at CERN LEP

Seungwon Baek, P. Ko, Jungil Lee, H. S. Song

Research output: Contribution to journalArticlepeer-review


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/ψ's via the color-octet and the color-singlet mechanisms are expected to be 19% and 29% longitudinally polarized, respectively. The energy dependence of η1,8(x) = dΓ1,8L/dx/dΓ is very sensitive to the production mechanism, and, therefore, the measurement of η(x)expt be an independent probe of the color-octet mechanism.

Original languageEnglish
Pages (from-to)6839-6843
Number of pages5
JournalPhysical Review D
Issue number3
Publication statusPublished - 2000
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)


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