Gauging flavour in meta-stable susy breaking models

Stefan Förste

doi:10.1016/j.physletb.2006.09.026

Winding uplifts and the challenges of weak and strong SUSY breaking in AdS

Journal of High Energy Physics ◽

10.1007/jhep03(2021)284 ◽

2021 ◽

Vol 2021 (3) ◽

Author(s):

Arthur Hebecker ◽

Sascha Leonhardt

Keyword(s):

Complex Structure ◽

Susy Breaking ◽

Technical Level ◽

De Sitter ◽

Large Complex ◽

Breaking Scale ◽

Large Complex Structure

Abstract We discuss the problem of metastable SUSY breaking in the landscape. While this is clearly crucial for the various de Sitter proposals, it is also interesting to consider the SUSY breaking challenge in the AdS context. For example, it could be that a stronger form of the non-SUSY AdS conjecture holds: it would forbid even metastable non-SUSY AdS in cases where the SUSY-breaking scale is parametrically above/below the AdS scale. At the technical level, the present paper proposes to break SUSY using the multi-cosine-shaped axion potentials which arise if a long winding trajectory of a ‘complex-structure axion’ appears in the large-complex-structure limit of a Calabi-Yau orientifold. This has been studied in the context of ‘Winding Inflation’, but the potential for SUSY breaking has not been fully explored. We discuss the application to uplifting LVS vacua, point out the challenges which one faces in the KKLT context, and consider the possibility of violating the non-SUSY AdS conjecture in the type-IIA setting of DGKT.

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SUSY breaking constraints on modular flavor S3 invariant SU(5) GUT model

Journal of High Energy Physics ◽

10.1007/jhep02(2021)221 ◽

2021 ◽

Vol 2021 (2) ◽

Cited By ~ 3

Author(s):

Xiaokang Du ◽

Fei Wang

Keyword(s):

Susy Breaking ◽

Flavor Symmetry ◽

Modular Invariance ◽

Lepton Flavor ◽

Flavor Structure ◽

Flavor Mixing ◽

Breaking Mechanism ◽

Gut Scale ◽

Additional Constraints ◽

Rule Out

Abstract Modular flavor symmetry can be used to explain the quark and lepton flavor structures. The SUSY partners of quarks and leptons, which share the same superpotential with the quarks and leptons, will also be constrained by the modular flavor structure and show a different flavor(mixing) pattern at the GUT scale. So, in realistic modular flavor models with SUSY completion, constraints from the collider and DM constraints can also be used to constrain the possible values of the modulus parameter. In the first part of this work, we discuss the possibility that the S3 modular symmetry can be preserved by the fixed points of T2/ZN orbifold, especially from T2/Z2. To illustrate the additional constraints from collider etc on modular flavor symmetry models, we take the simplest UV SUSY-completion S3 modular invariance SU(5) GUT model as an example with generalized gravity mediation SUSY breaking mechanism. We find that such constraints can indeed be useful to rule out a large portion of the modulus parameters. Our numerical results show that the UV-completed model can account for both the SM (plus neutrino) flavor structure and the collider, DM constraints. Such discussions can also be applied straightforwardly to other modular flavor symmetry models, such as A4 or S4 models.

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Aether SUSY breaking: can aether be alternative to F-term SUSY breaking?

Journal of High Energy Physics ◽

10.1007/jhep08(2021)048 ◽

2021 ◽

Vol 2021 (8) ◽

Author(s):

Yusuke Yamada

Keyword(s):

Fluid Model ◽

Realistic Model ◽

Lorentz Symmetry ◽

Susy Breaking ◽

Accelerated Expansion ◽

Condensation Model ◽

Matter Sector

Abstract We investigate supersymmetry (SUSY) breaking scenarios where both SUSY and Lorentz symmetry are broken spontaneously. For concreteness, we propose models in which scalar fluid or vector condensation breaks Lorentz symmetry and accordingly SUSY. Then, we examine whether such scenarios are viable for realistic model buildings. We find, however, that the scalar fluid model suffers from several issues. Then, we extend it to a vector condensation model, which avoids the issues in the scalar fluid case. We show that accelerated expansion and soft SUSY breaking in matter sector can be achieved. In our simple setup, the soft SUSY breaking is constrained to be less than $$ \mathcal{O}(100)\mathrm{TeV} $$ O 100 TeV from the constraints on modification of gravity.

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