TY - JOUR
T1 - Color-octet mechanism and J/ψ polarization at CERN LEP
AU - Baek, Seungwon
AU - Ko, P.
AU - Lee, Jungil
AU - Song, H. S.
N1 - Copyright:
Copyright 2006 Elsevier B.V., All rights reserved.
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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M3 - Article
AN - SCOPUS:33750192533
VL - 61
SP - 6839
EP - 6843
JO - Physical review D: Particles and fields
JF - Physical review D: Particles and fields
SN - 0556-2821
IS - 3
ER -