• Corpus ID: 117955838

On QCD and $\omega-\rho$ mixing

  title={On QCD and \$\omega-\rho\$ mixing},
  author={Nasrallah F. Nasrallah},
  journal={arXiv: High Energy Physics - Phenomenology},
  • N. Nasrallah
  • Published 2 March 1999
  • Physics
  • arXiv: High Energy Physics - Phenomenology
The evaluation of sum rules and vacuum condensates used in the calculation of the mixing parameters of the $\omega -\rho$ system involve dangerous cancellations of large numbers. In this note the contribution of the continuum is eliminated in order to avoid such a large source of uncertainty. It is also seen that the hypothesis of vacuum saturation used in the estimate of the dimension 6 condensate is inadequate. The value obtained for the parameter $\beta$ which governs the off-shell variation…