Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
1993-08-09
Phys.Lett.B317:559-564,1993
Physics
High Energy Physics
High Energy Physics - Theory
11 pages, harvmac, CERN-TH.6970/93 [ A new section on tachyonic equation is added: while there exists a scheme where the exact
Scientific paper
10.1016/0370-2693(93)91372-T
String backgrounds associated with gauged $G/H$ WZNW models in general depend non-trivially on $\alpha'$. We note, however, that there exists a local covariant $\a'$-dependent field redefinition that relates the exact metric-dilaton background corresponding to the $SL(2,R)/U(1)$ model to its leading-order form ($D=2$ black hole). As a consequence, there exists a `scheme' in which the string effective equations have the latter as an exact solution. However, the corresponding equation for the tachyon (which, like other Weyl anomaly coefficients, has scheme-dependent form) still contains corrections of all orders in $\alpha'$. As a result, the `probes' (the tachyons) still feel the $\alpha'$-corrected background. The field redefinitions we discuss contain the dilaton terms in the metric transformation law. We comment on exact forms of the duality transformation in different `schemes'.
No associations
LandOfFree
On field redefinitions and exact solutions in string theory 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 On field redefinitions and exact solutions in string theory, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and On field redefinitions and exact solutions in string theory will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-400671