On the S-matrix of Type 0 String Theory

Abstract

The recent discovery of non-perturbatively stable two-dimensional string backgrounds and their dual matrix models allows the study of complete scattering matrices in string theory. In this note we adapt work of Moore, Plesser, and Ramgoolam on the bosonic string to compute the exact S-matrices of 0A and 0B string theory in two dimensions. Unitarity of the 0B theory requires the inclusion of massless soliton sectors carrying RR scalar charge as asymptotic states. We propose a regularization of IR divergences and find transition probabilities that distinguish the otherwise energetically degenerate soliton sectors. Unstable D-branes can decay into distinct soliton sectors.

30 pages, 6 figures, harvmac

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• The Virasoro Minimal String
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• Two-Dimensional Unoriented Strings And Matrix Models
• Noncritical M-Theory in 2+1 Dimensions as a Nonrelativistic Fermi Liquid
• Matrix Models, Integrable Structures, and T-duality of Type 0 String Theory
• Normalization of D instanton amplitudes in two dimensional type 0B string theory
• The Cap in the Hat: Unoriented 2D Strings and Matrix(-Vector) Models
• Long Strings, Anomaly Cancellation, Phase Transitions, T-duality and Locality in the 2d Heterotic String
• String Interactions in c=1 Matrix Model
• Comments on 2D Type IIA String and Matrix Model
• On The Problem of Particle Production in c=1 Matrix Model
• Topological B-Model, Matrix Models, $\hat{c}=1$ Strings and Quiver Gauge Theories
• Scattered Results in 2D String Theory
• Minimal Superstrings and Loop Gas Models
• A matrix model black hole: act II
• Liouville D-branes in Two-Dimensional Strings and Open String Field Theory
• Note on D-Brane Effective Action in the Linear Dilaton Background
• A Two-Dimensional String Cosmology
• Infrared finite semi-inclusive cross section in two dimensional type 0B string theory
• The S-Matrix of 2D Type 0B String Theory Part 1: Perturbation Theory Revisited
• The S-Matrix of 2D Type 0B String Theory Part 2: D-Instanton Effects
• Topological B-model and $\hat{c}=1$ String Theory
• Proposal for the Open String Tachyon Effective Action in the Linear Dilaton Background
• Non-perturbative RR Potentials in the c=1 Matrix Model
• On Tachyon condensation and open-closed duality in the c=1 string theory
• Condensing Momentum Modes in 2-d 0A String Theory with Flux
• The stringy nature of the 2d type-0A black hole
• A Note on Tachyon Moduli and Closed Strings
• Vacuum States in 2D Tachyon Effective Action