Dilatonic gravity near two dimensions as a string theory

Details Dilatonic gravity near two dimensions as a string theory Dilatonic gravity near two dimensions as a string theory

1995-11-05

arxiv.org/abs/hep-th/9511031v1

Mod.Phys.Lett.A10:2001-2008,1995

Physics

High Energy Physics

High Energy Physics - Theory

9 pages, LATex file, to appear in Mod.Phys.Lett.A

Scientific paper

10.1142/S0217732395002155

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 the fixed point for the gravitational coupling remains to be the same as in previous studies being, in particular, non-trivial.

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