We recently proposed a class of type IIB vacua that yield, at low energies, four–dimensional Minkowski spaces with broken supersymmetry and a constant string coupling. They are compactifications with an internal five-torus bearing a five–form flux Φ and warp factors depending on a single coordinate. The breaking of supersymmetry occurs when the internal space includes a finite interval. A probe-brane analysis revealed a gravitational repulsion and a charge attraction of equal magnitude from the left end of the interval, together with a singularity at the other end. Here we complete the analysis revealing the presence, at one end, of an effective O3 of negative tension and positive five–form charge. We also determine the values of these quantities, showing that T = −Q = Φ, and characterize the singularity present at the other end of the interval, which hosts an opposite charge. Finally, we discuss various forms of the gravity action in the presence of a boundary and identify a self–adjoint form for its fluctuations.

Effective orientifolds from broken supersymmetry

Mourad, Jihad
Membro del Collaboration Group
;
Sagnotti, Augusto
2024

Abstract

We recently proposed a class of type IIB vacua that yield, at low energies, four–dimensional Minkowski spaces with broken supersymmetry and a constant string coupling. They are compactifications with an internal five-torus bearing a five–form flux Φ and warp factors depending on a single coordinate. The breaking of supersymmetry occurs when the internal space includes a finite interval. A probe-brane analysis revealed a gravitational repulsion and a charge attraction of equal magnitude from the left end of the interval, together with a singularity at the other end. Here we complete the analysis revealing the presence, at one end, of an effective O3 of negative tension and positive five–form charge. We also determine the values of these quantities, showing that T = −Q = Φ, and characterize the singularity present at the other end of the interval, which hosts an opposite charge. Finally, we discuss various forms of the gravity action in the presence of a boundary and identify a self–adjoint form for its fluctuations.
2024
Settore FIS/02 - Fisica Teorica, Modelli e Metodi Matematici
string theory; field theory; supersymmetry breaking; effective orientifolds
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11384/144885
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