A 4D IIB flux vacuum and supersymmetry breaking. Part I. Fermionic spectrum - Archive ouverte HAL
Article Dans Une Revue Journal of High Energy Physics Année : 2022

A 4D IIB flux vacuum and supersymmetry breaking. Part I. Fermionic spectrum

A. Sagnotti
  • Fonction : Auteur

Résumé

We consider the type-IIB supergravity vacua that include an internal T$^{5}$, depend on a single coordinate r and respect a four-dimensional Poincaré symmetry, with the aim of highlighting low-energy spectra with broken supersymmetry and a bounded string coupling. These vacua are characterized by the flux Φ of the self-dual five form in the internal torus, the length ℓ of the interval described by the coordinate r, a dilaton profile that is inevitably constant and a strictly positive dimensionless parameter h. As ℓ → ∞ while retaining finite values for Φ and $ \mathrm{\ell}{h}^{-\frac{5}{4}} $, half of the original ten-dimensional supersymmetry is recovered, while finite values of ℓ break it completely. In the large-ℓ limit one boundary disappears but the other is still present, and is felt as a BPS orientifold by a probe brane. In this paper we focus on the fermionic zero modes and show that, although supersymmetry is broken for finite values of ℓ, they are surprisingly those of four-dimensional N = 4 supergravity coupled to five vector multiplets. Still, the gravitini can acquire masses via radiative corrections, absorbing four of the massless spin-$ \frac{1}{2} $ modes.

Dates et versions

hal-03702106 , version 1 (22-06-2022)

Identifiants

Citer

J. Mourad, A. Sagnotti. A 4D IIB flux vacuum and supersymmetry breaking. Part I. Fermionic spectrum. Journal of High Energy Physics, 2022, 08, pp.301. ⟨10.1007/JHEP08(2022)301⟩. ⟨hal-03702106⟩
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