Conformal symmetry and central charges in 4 dimensions

  title={Conformal symmetry and central charges in 4 dimensions},
  author={Ignatios Antoniadis and Pawel O. Mazur and Emil Mottola},
  journal={Nuclear Physics},
The trace anomaly of matter in curved space generates an effective action for the conformal factor of the metric tensor in D = 4 dimensions, analogous to the Polyakov action for D = 2. We compute the contributions of the reparameterization ghosts to the central charges for D = 4, as well as the quantum contribution of the conformal factor itself. The ghost contribution satisfies the necessary Wess-Zumino consistency condition only if combined with the spin-2 modes, whose contributions to the… 
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