Dilatonic Gravity Near Two Dimensions as a String Theory
Abstract
Using the renormalization group formalism, a sigma model of a special type — in which the metric and the dilaton depend explicitly on one of the string coordinates only — is investigated near two dimensions. It is seen that dilatonic gravity coupled to N scalar fields can be expressed in this form, using a string parametrization, and that it possesses the usual uv fixed point. However, in this stringy parametrization of the theory the fixed point for the scalar-dilaton coupling turns out to be trivial, while that for the gravitational coupling remains the same as in previous studies being, in particular, nontrivial.
- Publication:
-
Modern Physics Letters A
- Pub Date:
- 1995
- DOI:
- 10.1142/S0217732395002155
- arXiv:
- arXiv:hep-th/9511031
- Bibcode:
- 1995MPLA...10.2001E
- Keywords:
-
- High Energy Physics - Theory
- E-Print:
- 9 pages, LATex file, to appear in Mod.Phys.Lett.A