1991/09/18 by S. Kalyana Rama
Physics and Astronomy · #hep-th
published as Mod. Phys. Lett. A6 (1991) 3531-3542 · 15 pages
arxiv created 1991/09/18 · arxiv updated 2009/11/30
We find new special physical operators of W3 -gravity having non trivial ghost sectors. Some of these operators may be viewed as the liouville dressings of the energy operator of the Ising model coupled to \it 2d~gravity and this fills in a gap in the connection between pure W3 -gravity and Ising model coupled to 2d gravity found in our previous work. We formulate a selection rule required for the calculation of correlators in W -gravity theories. Using this rule, we construct the non ghost part of the new operators of WN -gravity and find that they represent the (N , N+1) minimal model operators from both inside and outside the minimal table. Along the way we obtain the canonical spectrum of WN -gravity for all N .