On gauge couplings and thresholds in Type I Gepner models and otherwise

Abstract

We derive general formulae for tree level gauge couplings and their one-loop thresholds in Type I models based on genuinely interacting internal N=2 SCFT's, such as Gepner models. We illustrate our procedure in the simple yet non-trivial instance of the Quintic. We briefly address the phenomenologically more relevant issue of determining the Weinberg angle in this class of models. Finally we initiate the study of the correspondence between `magnetized' or `coisotropic' D-branes in Gepner models and twisted representations of the underlying N=2 SCA.

33 pages

References in corpus (20)

• Four-dimensional String Compactifications with D-Branes, Orientifolds and Fluxes
• Orientifolds, hypercharge embeddings and the Standard Model
• Anomalies, Anomalous U(1)'s and generalized Chern-Simons terms
• Microstates of a Neutral Black Hole in M Theory
• Brane world effective actions for D-branes with fluxes
• Some Superstring Amplitude Computations with the Non-Minimal Pure Spinor Formalism
• Open strings and their symmetry groups
• String predictions for near future colliders from one-loop scattering amplitudes around D-brane worlds
• The Minimal Quiver Standard Model
• Four-Point One-Loop Amplitude Computation in the Pure Spinor Formalism
• Moduli stabilization with open and closed string fluxes
• Intersecting Brane Worlds at One Loop
• Chiral Gepner Model Orientifolds
• Anomalous U(1)'s, Chern-Simons couplings and the Standard Model
• MSSM GUT String Vacua, Split Supersymmetry and Fluxes
• Solving Flavor Puzzles with Quiver Gauge Theories
• Beyond the SM; D-brane model building from intersecting brane worlds
• Moduli stabilization with non-Abelian fluxes
• On Susy Standard-like models from orbifolds of D=6 Gepner orientifolds
• On Cardy states in the (2,2,2,2) Gepner model

Cited by in corpus (12)

• D-brane Instantons on the T^6/Z_3 orientifold
• Non-perturbative and Flux superpotentials for Type I strings on the Z_3 orbifold
• Instantons and Holomorphic Couplings in Intersecting D-brane Models
• Thresholds for Intersecting D-branes Revisited
• Gauge Threshold Corrections for Local String Models
• Comments on Orientifolds without Vector Structure
• Enriques and Octonionic Magic Supergravity Models
• Simplifying one-loop amplitudes in superstring theory
• One-loop Yukawa Couplings in Local Models
• Toward metastable string vacua from magnetized branes
• One-loop and D-instanton corrections to the effective action of open string models
• On Cardy states in the (2,2,2,2) Gepner model