4 papers
Dimers, Orientifolds and Anomalies
Riccardo Argurio, Matteo Bertolini, Sebastián Franco +4
We study gauge theories engineered via D-branes at orientifolds of toric singularities, where gauge anomalies are cancelled without the introduction of non-com…
Dimers, Orientifolds and Stability of Supersymmetry Breaking Vacua
Riccardo Argurio, Matteo Bertolini, Sebastián Franco +4
We study (orientifolded) toric Calabi-Yau singularities in search for D-brane configurations which lead to dynamical supersymmetry breaking at low energy. By exploiting dimer techn…
The Octagon and the Non-Supersymmetric String Landscape
Riccardo Argurio, Matteo Bertolini, Sebastián Franco +4
We present an orientifold of a toric singularity allowing for a configuration of fractional branes which corresponds to a gauge theory that dynamically breaks supersymmetry in a st…
Cusps, Congruence Groups and Monstrous Dessins
Valdo Tatitscheff, Yang-Hui He, John McKay
We study general properties of the dessins d'enfants associated with the Hecke congruence subgroups of the modular group . The definition of th…