ar X iv : h ep - t h / 92 05 06 3 v 1 1 8 M ay 1 99 2 A Study of Two Dimensional String Theory

ar X iv : h ep - t h / 06 05 27 4 v 1 2 8 M ay 2 00 6 hep - th / 0605274 Metric and coupling reversal in string theory

Invariance under reversing the sign of the metric G M N (x) and/or the sign of the string coupling field H Universe K contains only F1 and NS5 of IIB and Heterotic SO(32).

ar X iv : h ep - t h / 93 05 06 9 v 1 1 5 M ay 1 99 3 Dilaton , moduli and string / five - brane duality as seen from four dimensions

Dilaton, moduli and string/five-brane duality as seen from four dimensions. Abstract A naive dimensional reduction of the N = 1, D = 10 supergravity theory that naturally arises in five-brane models is used to determine the rôle of two fields which are basic ingredients of string models: the dilaton and, among the moduli, the breathing mode. It is shown that, under the duality transformation th...

X iv : h ep - t h / 92 05 02 0 v 1 8 M ay 1 99 2 Divergences of Discrete States Amplitudes and Effective Lagrangian in 2 D String Theory . I . Ya

Scattering amplitudes for discrete states in 2D string theory are considered. Pole divergences of tree-level amplitudes are extracted and residues are interpreted as renormalized amplitudes for discrete states. An effective Lagrangian generating renormalized amplitudes for open string is written and corresponding Ward identities are presented. A relation of this Lagrangian with homotopy Lie alg...

ar X iv : h ep - t h / 98 05 09 3 v 1 1 5 M ay 1 99 8 A Course on : “ Modular Localization and Nonperturbative Local Quantum Physics ”

ar X iv : h ep - t h / 92 05 06 7 v 2 2 5 M ay 1 99 2 Discussion of Self - Dual c = 24 Conformal Field Theories

We discuss questions arising from the recent work of Schellekens[17], and also from an earlier paper by Schellekens and Yankielowicz[19]. We summarise Schellekens' results, and proceed to discuss the uniqueness of the c = 24 self-dual conformal field theory with no weight one states, i.e. the Monster module V ♮ [8]. After introducing the concept of complementary representations, we examine Z 2-...