Color-octet heavy quarkonium productions in Z0 decays at LEP
arXiv:hep-ph/9607236 · doi:10.1016/S0370-2693(96)01313-5
Abstract
We consider the energy and the polar angle distributions of J/Ï's produced via the color-singlet and the color-octet (^3S_1^{(8)}) mechanisms in Z^0 \to J/Ï+X at LEP. Since both distributions of the J/Ïproduced via color-octet mechanism are significantly different from those via color-singlet mechanism, these observables can be used as tests of color-octet production mechanism for heavy quarkonia. We also discuss Z^0 \rightarrow Î¥+ X and W \to J/Ï( or Î¥) + X in brief.
16 pages, LaTeX using revtex and epsfig. The version to appear in Phys. Lett. B. With more discussions on the angular distributions. Some references added and updated