Conformal symmetry and central charges in 4 dimensions
Abstract
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 WessZumino consistency condition only if combined with the spin2 modes, whose contributions to the trace anomaly we also discuss.
 Publication:

Nuclear Physics B
 Pub Date:
 December 1992
 DOI:
 10.1016/05503213(92)90557R
 arXiv:
 arXiv:hepth/9205015
 Bibcode:
 1992NuPhB.388..627A
 Keywords:

 High Energy Physics  Theory
 EPrint:
 20 pages, corrected tex version