A study of spin alignment of ρ(770)± and w(782) mesons in hadronic Z0 decays
2000
The helicity density matrix elements ρ00 of ρ(770)± and ω(782) mesons produced in Z0 decays have been measured using the OPAL detector at LEP. Over the measured meson energy range, the values are compatible with 1/3, corresponding to a statistical mix of helicity −1, 0 and +1 states. For the highest accessible scaled energy range 0.3 vector mesons.
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