Superstrings beyond one loop

Abstract

This Laurea Thesis contains six introductory chapters (I-VI) on various aspects of String Theory, mostly related to String compactifications, orientifold constructions and SUSY breaking. On the other hand, the last chapter contains some new results on amplitudes on surfaces with Euler character -1 or -2. These are based on the construction of D'Hoker and Phong, and contain some extensions of their results to type-0 theories.

Laurea Thesis (in Italian). Latex, 233 pages, 17 figures

References in corpus (25)

• Dirichlet-Branes and Ramond-Ramond Charges
• Evidence for Heterotic - Type I String Duality
• Consistency Conditions for Orientifolds and D-Manifolds
• Open Strings
• Applied Conformal Field Theory
• Type-I strings on magnetised orbifolds and brane transmutation
• Brane Supersymmetry Breaking
• On tadpoles and vacuum redefinitions in String Theory
• A WAY TO BREAK SUPERSYMMETRY
• Toroidal Compactification Without Vector Structure
• Completeness Conditions for Boundary Operators in 2D Conformal Field Theory
• String Theory on Calabi-Yau Manifolds
• Two-Loop Superstrings VI: Non-Renormalization Theorems and the 4-Point Function
• Planar Duality in $SU(2)$ WZW Models
• Introduction to Superstring Theory
• Enhanced Gauge Symmetries in Superstring Theories
• A Note on Toroidal Compactifications of the Type I Superstring and Other Superstring Vacuum Configurations with 16 Supercharges
• Sewing Constraints and Non-Orientable Open Strings
• Non-tachyonic open descendants of the 0B string theory
• Two-Loop Superstrings V: Gauge Slice Independence of the N-Point Function
• Some Properties of Open - String Theories
• Tachyon-free Orientifolds of Type 0B Strings in Various Dimensions
• Magnetized Four-Dimensional $Z_2\times Z_2$ Orientifolds
• Lectures on Two-Loop Superstrings
• Superstring Dualities