Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
1992-10-30
Z.Phys. C57 (1993) 663-670
Physics
High Energy Physics
High Energy Physics - Theory
16 pages, Latex,HU-Berlin-IEP-92/6 (One footnote and two citations added.)
Scientific paper
10.1007/BF01561486
We consider correlation functions in Neveu--Schwarz string theory coupled to two dimensional gravity. The action for the 2D gravity consists of the string induced Liouville action and the Jackiw--Teitelboim action describing pure 2D gravity. Then gravitational dressed dimensions of vertex operators are equal to their bare conformal dimensions. There are two possible interpretations of the model. Considering the 2D dilaton and the Liouville field as additional target space coordinates one gets a $d+2$-dimensional critical string. In the $d$-dimensional non critical string picture gravitational fields retain their original meaning and for $d=4$ one can get a mass spectrum via consistency requirements. In both cases a GSO projection is possible.
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