Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
1993-01-06
Nucl.Phys.B399:601-622,1993
Physics
High Energy Physics
High Energy Physics - Theory
26 pages, harvmac, Imperial/TP/92-93/10 (misprints corrected and some explanations added)
Scientific paper
10.1016/0550-3213(93)90511-M
We suggest how to derive the exact (all order in $\a'$) expressions for the background fields for string solutions corresponding to gauged WZW models directly at the $2d$ field theory level. One is first to replace the classical gauged WZW action by the quantum effective one and then to integrate out the gauge field. We find the explicit expression for the gauge invariant non-local effective action of the gauged WZW model. The two terms (corresponding to the group and subgroup) which appear with the same coefficients in the classical action get different $k$-dependent coefficients in the effective one. The procedure of integrating out the gauge field is considered in detail for the $SL(2,R)/U(1)$ model and the exact expressions for the $D=2$ metric and the dilaton (originally found in the conformal field theory approach) are reproduced.
No associations
LandOfFree
Effective action of gauged WZW model and exact string solutions does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Effective action of gauged WZW model and exact string solutions, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Effective action of gauged WZW model and exact string solutions will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-586732