Superstring Theory and CP- Violating Phases: Can They Be Related?

Abstract

We investigate the possibility of large CP- violating phases in the soft breaking terms derived in superstring models. The bounds on the electric dipole moments (EDM's) of the electron and neutron are satisfied through cancellations occuring because of the structure of the string models. Three general classes of four-dimensional string models are considered: (i) orbifold compactifications of perturbative heterotic string theory, (ii) scenarios based on Hořava-Witten theory, and (iii) Type I string models (Type IIB orientifolds). Nonuniversal phases of the gaugino mass parameters greatly facilitate the necessary cancellations among the various contributions to the EDM's; in the overall modulus limit, the gaugino masses are universal at tree level in both the perturbative heterotic models and the Hořava-Witten scenarios, which severely restricts the allowed regions of parameter space. Nonuniversal gaugino masses do arise at one-loop in the heterotic orbifold models, providing for corners of parameter space with $\mathcal{O}(1)$ phases consistent with the phenomenological bounds. However, there is a possibility of nonuniversal gaugino masses at tree level in the Type I models, depending on the details of the embedding of the SM into the D- brane sectors. We find that in a minimal model with a particular embedding of the Standard Model gauge group into two D- brane sectors, viable large phase solutions can be obtained over a wide range of parameter space.

28 pages, 6 figures; corrected bug in the code and a few typos, results qualitatively unchanged

References in corpus (3)

• Constraints on Phases of Supersymmetric Flavour Conserving Couplings
• Supersymmetry Breakdown at Distant Branes: The Super-Higgs Mechanism
• Sparticle spectrum in M-theory with five-brane dominance

Cited by in corpus (58)

• Proton stability in grand unified theories, in strings, and in branes
• EDM Constraints in Supersymmetric Theories
• CPsuperH: a Computational Tool for Higgs Phenomenology in the Minimal Supersymmetric Standard Model with Explicit CP Violation
• CP-Violating MSSM Higgs Bosons in the Light of LEP 2
• Gaugino Mass Nonuniversality and Dark Matter in SUGRA, Strings and D Brane Models
• Higgs-Mediated Electric Dipole Moments in the MSSM: An Application to Baryogenesis and Higgs Searches
• Coannihilation Effects in Supergravity and D-Brane Models
• Supersymmetric Dark Matter - How Light Can the LSP Be?
• Corrections to the Higgs Boson Masses and Mixings from Chargino, W and Charged Higgs Exchange Loops and Large CP Phases
• Obstructed D-Branes in Landau-Ginzburg Orbifolds
• LHC Signatures of Resonant CP Violation in a Minimal Supersymmetric Higgs Sector
• General Flavor Blind MSSM and CP Violation
• Effective Action and Soft Supersymmetry Breaking for Intersecting D-brane Models
• Sleptonarium (Constraints on the CP and Flavour Pattern of Scalar Lepton Masses)
• Neutralino Exchange Corrections to the Higgs Boson Mixings with Explicit CP Violation
• CP Violation Effects on $B_{s,d}^0\to l^{+}{l}^{-}$ in Supersymmetry at Large $\tan \beta$
• Effect of supersymmetric phases on lepton dipole moments and rare lepton decays
• An Improved Analysis of $b\to s\gamma$ in Supersymmetry
• CP violation and modular symmetries
• Non-Universal Gaugino Masses in Supersymmetric SO(10)
• The Chromoelectric Dipole Moment of the Top Quark in Models with Vector Like Multiplets
• Top Squarks and Bottom Squarks in the MSSM with Complex Parameters
• The top quark electric dipole moment in an MSSM extension with vector like multiplets
• Sensitivity of Supersymmetric Dark Matter to the b Quark Mass
• Diffraction as a CP and Lineshape Analyzer for MSSM Higgs Bosons at the LHC
• SUSY Phases, the Electron Electric Dipole Moment and the Muon Magnetic Moment
• Dilaton Stabilization in Effective Type I String Models
• On the EDM Cancellations in D-brane models
• Resonant CP Violation in MSSM Higgs Production and Decay at $\gamma \gamma$ Colliders
• Determination of the String Scale in D-Brane Scenarios and Dark Matter Implications
• SUSY QCD and SUSY Electroweak Loop Corrections to $b,t$ and $\tau$ Masses Including the Effects of CP Phases
• Observing a Light CP-Violating Higgs Boson in Diffraction
• Fermion Masses and Mixing in Intersecting Branes Scenarios
• A CP sensitive asymmetry in the three--body decay stop_1 -> b tau+ tau-sneutrino
• Effects of Large CP Phases on the Proton Lifetime in Supersymmetric Unification
• Decays of Higgs to $b\bar{b}$, $\tau \bar{\tau }$ and $c\bar{c}$ as Signatures of Supersymmetry and CP Phases
• CP asymmetries in scalar bottom quark decays
• Singlino dominated LSP as CDM candidate in supersymmetric models with an extra U(1)
• CP asymmetries in chargino production and decay: the three-body decay case
• Effects of Large CP-violating Soft Phases on Supersymmetric Electroweak Baryogenesis
• Signals for CP Violation in Split Supersymmetry
• Higgs Phenomenology with CPsuperH
• Neutralino decay of MSSM neutral Higgs bosons
• SUSY breaking based on Abelian gaugino kinetic term mixings
• Effective Lagrangian for ${\chi }_i^{+}{\chi }_j^0{H}^{-}$ Interaction in the MSSM and Charged Higgs Decays
• Weak Isospin Violations in Charged and Neutral Higgs Couplings from SUSY Loop Corrections
• CP violation in realistic String Models with family universal anomalous U(1)
• Effective Lagrangian for $\bar{q}{\tilde{q}}_i^{\prime }{\chi }_j^{+}$, $\bar{q}{\tilde{q}}_i^{\prime }{\chi }_j^0$ interactions and Fermionic Decays of the Squarks with CP Phases
• Breaking CP and supersymmetry with orbifold moduli dynamics
• Soft SUSY breaking masses in a unified model with doublet-triplet splitting
• The anomalous Higgs-top couplings in the MSSM
• Refining the predictions of supersymmetric CP-violating models: A top-down approach
• A decaying neutralino as dark matter and its gamma ray spectrum
• Effective Lagrangian for the ${\chi }_j^{+}{\chi }_k^{-}{H}_l^0$ interaction in the minimal supersymmetric standard model and neutral Higgs decays
• Gaugino CP phases and EDMs in the extended gauge mediation SUSY breaking
• CP violation in decays of the lightest supersymmetric particle with bilinearly broken R parity
• Phenomenological features in a model with non-universal gaugino CP phases
• Squark Decays in MSSM Under the Cosmological Bounds