Abstract.
The helicity density matrix elements \(\rho_{00}\) of \(\rho(770)^{\pm}\) and \(\omega(782)\) mesons produced in Z\(^0\) 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 \(<\) \(x_E\) \(<\) 0.6, the measured \(\rho_{00}\) values of the \(\rho^{\pm}\) and the \(\omega\) are 0.373 \(\pm\) 0.052 and 0.142 \(\pm\) 0.114, respectively. These results are compared to measurements of other vector mesons.
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Received: 14 June 1999 / Published online: 8 May 2000
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The OPAL Collaboration., Abbiendi et al., G. A study of spin alignment of \(\rho(770)^{\pm}\) and \(\omega(782)\) mesons in hadronic Z\(^0\) decays. Eur. Phys. J. C 16, 61–70 (2000). https://doi.org/10.1007/s100520050003
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DOI: https://doi.org/10.1007/s100520050003