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

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

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

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

Department of Physics

Research output: Contribution to journal › Article › peer-review

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/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 η_1,8(x) = dΓ_1,8^L/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 language	English
Pages (from-to)	6839-6843
Number of pages	5
Journal	Physical Review D
Volume	61
Issue number	3
Publication status	Published - 2000

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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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/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.",

author = "Seungwon Baek and P. Ko and Jungil Lee and Song, {H. S.}",

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AU - Baek, Seungwon

AU - Ko, P.

AU - Lee, Jungil

AU - Song, H. S.

PY - 2000

Y1 - 2000

N2 - 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.

AB - 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.

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