Non-Supersymmetric Type I Strings with Zero Vacuum Energy

Abstract

We study open descendants of non-supersymmetric type IIB asymmetric (freely acting) orbifolds with zero cosmological constant. A generic feature of these models is that supersymmetry remains unbroken on the brane at all mass levels, while it is broken in the bulk in a way that preserves Fermi-Bose degeneracy in both the massless and massive (closed string) spectrum. This property remains valid in the heterotic dual of the type II model but only for the massless excitations. A possible application of these constructions concerns scenarios of low-energy supersymmetry breaking with large dimensions.

22 pages, TeX, harvmac. Minor corrections. Final version to appear on Nucl.Phys.B

References in corpus (1)

• Tachyon-free Orientifolds of Type 0B Strings in Various Dimensions

Cited by in corpus (53)

• Comments on Open-String Orbifolds with a Non-Vanishing B_{ab}
• Type I vacua with brane supersymmetry breaking
• Towards a Non-Supersymmetric String Phenomenology
• Theory and Phenomenology of Type I strings and M-theory
• Charged and Uncharged D-branes in various String Theories
• Geometric Couplings and Brane Supersymmetry Breaking
• Magnetized Four-Dimensional $Z_2\times Z_2$ Orientifolds
• On the Number of Chiral Generations in Z2 X Z2 Orbifolds
• Chiral Heterotic Strings with Positive Cosmological Constant
• Super no-scale models in string theory
• On exponential suppression of the cosmological constant in non-SUSY strings at two loops and beyond
• Solving the Hierarchy Problem without Supersymmetry or Extra Dimensions: An Alternative Approach
• Time and space dependent backgrounds from nonsupersymmetric strings
• D-branes in String theory Melvin backgrounds
• Partition functions of NAHE-based free fermionic string models
• A Naturally Small Cosmological Constant on the Brane?
• Asymmetric Orientifolds, Brane Supersymmetry Breaking and Non-BPS Branes
• Discrete torsion in non-geometric orbifolds and their open-string descendants
• Interpolations Among NAHE-based Supersymmetric and Nonsupersymmetric String Vacua
• The open story of the magnetic fluxes
• Non-supersymmetric Asymmetric Orbifolds with Vanishing Cosmological Constant
• Quantum no-scale regimes and moduli dynamics
• Generalised universality of gauge thresholds in heterotic vacua with and without supersymmetry
• Stability and vacuum energy in open string models with broken supersymmetry
• N=2 -> 0 super no-scale models and moduli quantum stability
• D-branes in an asymmetric orbifold
• Orientifolds, RG Flows, and Closed String Tachyons
• On interpolations from SUSY to non-SUSY strings and their properties
• The Cosmological Constant Problem, an Inspiration for New Physics
• More on Non-supersymmetric Asymmetric Orbifolds with Vanishing Cosmological Constant
• Quantum no-scale regimes in string theory
• Mirrorfolds with K3 Fibrations
• Suppressing the Cosmological Constant in Non-Supersymmetric Type I Strings
• Mass scales, supersymmetry breaking and open strings
• D-branes in T-fold conformal field theory
• Vanishing Perturbative Vacuum Energy in Non-Supersymmetric Orientifolds
• Non-tachyonic Scherk-Schwarz compactifications, cosmology and moduli stabilization
• Non-perturbative transitions among intersecting-brane vacua
• Geometry of orientifold vacua and supersymmetry breaking
• Super No-Scale Models with Pati-Salam Gauge Group
• Open Strings and Supersymmetry Breaking
• Gravitational Threshold Corrections in Non-Supersymmetric Heterotic Strings
• Aspects of Type 0 String Theory
• Open-string models with broken supersymmetry
• Remark on Calabi-Yau vacua of the string theory and the cosmological constant problem
• Non-SUSY Heterotic String Vacua of Gepner Models with Vanishing Cosmological Constant
• Three-Generation Super No-Scale Models in Heterotic Superstrings
• Non-Supersymmetric Open String Vacua
• $R^2$ Dark Energy in the Laboratory
• Radiative stability of tiny cosmological constant from the Swampland and quantized compactification
• Notes on Vanishing Cosmological Constant without Bose-Fermi Cancellation
• Non-BPS Fractional Branes with Bose-Fermi Cancellation in Asymmetric Orbifolds
• Non-supersymmetric D-branes with Vanishing Cylinder Amplitudes in Asymmetric Orbifolds