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1.
  • Argurio, Riccardo, et al. (författare)
  • The Octagon at large M
  • 2022
  • Ingår i: Journal of High Energy Physics (JHEP). - : Springer. - 1126-6708 .- 1029-8479.
  • Tidskriftsartikel (refereegranskat)abstract
    • Recently, the first instance of a model of D-branes at Calabi-Yau singularities where supersymmetry is broken dynamically into stable vacua has been proposed. This construction was based on a system of N regular and M = 1 fractional branes placed at the tip of the so-called (orientifolded) Octagon singularity. In this paper we show that this model admits a large M generalization, having the same low energy effective dynamics. This opens up the possibility that the effect on geometry is smooth, and amenable to describing the gauge theory all along the RG flow, including the deep IR, in terms of a weakly coupled gravity dual background. The relevance of this result in the wider context of the string landscape and the Swampland program is also discussed.
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2.
  • Del Zotto, Michele, et al. (författare)
  • Higher symmetries of 5D orbifold SCFTs
  • 2022
  • Ingår i: Physical Review D. - : American Physical Society. - 2470-0010 .- 2470-0029. ; 106:4
  • Tidskriftsartikel (refereegranskat)abstract
    • We determine the higher symmetries of 5D SCFTs engineered from M-theory on a C3/r background for r a finite subgroup of SU(3). This resolves a longstanding question as to how to extract this data when the resulting singularity is nontoric (when r is non-Abelian) and/or not isolated (when the action of r has fixed loci). The Bogomol'nyi-Prasad-Sommerfield (BPS) states of the theory are encoded in a 1D quiver quantum mechanics gauge theory which determines the possible 1-form and 2-form symmetries. We also show that this same data can also be extracted by a direct computation of the corresponding defect group associated with the orbifold singularity. Both methods agree, and these computations do not rely on the existence of a resolution of the singularity. We also observe that when the geometry faithfully captures the global 0-form symmetry, the abelianization of r detects a 2-group structure (when present). As such, this establishes that all of this data is indeed intrinsic to the superconformal fixed point rather than being an emergent property of an IR gauge theory phase.
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