Issues on tadpoles and vacuum redefinitions in String Theory
arXiv:hep-th/0503204
Abstract
This Thesis discusses a number of issues related to the problem of tadpoles and vacuum redefinitions that the breaking of supersymmetry brings about in String Theory. The idea pursued here is to try to formulate the theory in a ``wrong'' vacuum (the vacuum that one naively identifies prior to the redefinitions) and, gaining some intuition from some simpler field theory settings, try to set up a calculational scheme for vacuum redefinitions in String Theory. This requires in general complicated resummations, but some simpler cases can be identified. This is true, in principle, for models with fluxes, where tadpoles can be perturbatively small, and for the one-loop threshold corrections, that in a large class of models (without rotated branes) remain finite even in the presence of tadpoles. The contents of the Thesis elaborate on those of hep-th/0410101, but include a number of additions, related to the explicit study of a quartic potential in Field Theory, where some subtleties were previously overlooked, and to the explicit evaluation of the one-loop threshold corrections for a number of string models with broken supersymmetry.
175 pages, 16 eps figures. v2,v3: reference added and defective pdf
References in corpus (44)
- The Hierarchy Problem and New Dimensions at a Millimeter
- Dirichlet-Branes and Ramond-Ramond Charges
- Hierarchies from Fluxes in String Compactifications
- Evidence for Heterotic - Type I String Duality
- Tachyon Condensation on the Brane Antibrane System
- Consistency Conditions for Orientifolds and D-Manifolds
- Open Strings
- Applied Conformal Field Theory
- Algebras, BPS States, and Strings
- Type-I strings on magnetised orbifolds and brane transmutation
- Brane Supersymmetry Breaking
- A WAY TO BREAK SUPERSYMMETRY
- Scattering of Gauge, Matter, and Moduli Fields from Intersecting Branes
- Toroidal Compactification Without Vector Structure
- K3 Surfaces and String Duality
- Completeness Conditions for Boundary Operators in 2D Conformal Field Theory
- TeV Strings and Collider Probes of Large Extra Dimensions
- Planar Duality in WZW Models
- Introduction to Superstring Theory
- Standard-like Models with Broken Supersymmetry from Type I String Vacua
- MSSM vacua from Flux Compactifications
- The Standard Model on a D-brane
- Consistent gravitino couplings in non-supersymmetric strings
- Non-BPS States and Branes in String Theory
- 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
- Invisible Axions and Large-Radius Compactifications
- Non-tachyonic open descendants of the 0B string theory
- Charged and Uncharged D-branes in various String Theories
- Open strings and their symmetry groups
- Some Properties of Open - String Theories
- Generalized symmetry breaking on orbifolds
- Tachyon-free Orientifolds of Type 0B Strings in Various Dimensions
- String theory predictions for future accelerators
- Magnetized Four-Dimensional Orientifolds
- Time and space dependent backgrounds from nonsupersymmetric strings
- Type-I vacua and brane transmutation
- D-brane Models with Non-Linear Supersymmetry
- Intersecting Brane Worlds on Tori and Orbifolds
- Power-Like Threshold Corrections to Gauge Unification in Extra Dimensions
- Gauge Unification in Extra Dimensions: Power Corrections vs. Higher-Dimension Operators
- On Field Theory of Open Strings, Tachyon Condensation and Closed Strings
- Discrete moduli for Type I compactifications
- One-Loop Threshold Effects in String Unification