Results 11 to 20 of about 5,628 (239)

Twisted orientifold planes and S-duality without supersymmetry [PDF]

open access: greenJournal of High Energy Physics
We construct a novel orientifold of type IIB string theory that breaks all supersymmetries. It is a closed string theory without open sector and it can be understood as a Scherk-Schwarz deformation in which supersymmetry is restored at infinite radius ...
G. Bossard, G. Casagrande, E. Dudas
doaj   +5 more sources

Scale factor duality and hidden supersymmetry in scalar-tensor cosmology. [PDF]

open access: greenPhysical Review D, Particles and fields, 1995
It is shown that spatially flat, isotropic cosmologies derived from the Brans-Dicke gravity action exhibit a scale factor duality invariance. This classical duality is then associated with a hidden N=2 supersymmetry at the quantum level and the ...
J. Lidsey
semanticscholar   +3 more sources

Space time interpretation of S-duality and supersymmetry violations of T-duality [PDF]

open access: greenPhysics Letters B, 1995
The S--duality transformations of the lowest order string effective theory admit a space time interpretation for 4-dim backgrounds with one Killing symmetry. Starting from pure gravity and performing a sequence of intertwined T-S-T duality transformations we obtain new solutions which are always pure gravitational. In this fashion, S-duality induces an
Ioannis Bakas
openaire   +4 more sources

Supersymmetry breaking at the end of a cascade of Seiberg dualities [PDF]

open access: greenPhysical Review D, 2005
We study the IR dynamics of the cascading non-conformal quiver theory on N regular and M fractional D3 branes at the tip of the complex cone over the first del Pezzo surface. The horizon of this cone is the irregular Sasaki-Einstein manifold Y^{2,1}. Our analysis shows that at the end of the cascade supersymmetry is dynamically broken.
Bertolini, M.   +2 more
openaire   +7 more sources

N = (4,4) Supersymmetry and T-Duality [PDF]

open access: goldSymmetry, 2012
A sigma model with four-dimensional target space parametrized by chiral and twisted chiral N =(2,2) superfields can be extended to N =(4,4) supersymmetry off-shell, but this is not true for a model of semichiral fields, where the N = (4,4) supersymmetry can only be realized on-shell. The two models can be related to each other by T-duality.
Malin Göteman
openaire   +5 more sources

Duality, partial supersymmetry, and arithmetic number theory [PDF]

open access: yesJournal of Mathematical Physics, 1998
We find examples of duality among quantum theories that are related to arithmetic functions by identifying distinct Hamiltonians that have identical partition functions at suitably related coupling constants or temperatures. We are led to this after first developing the notion of partial supersymmetry, in which some, but not all, of the operators of a ...
D. Spector
openaire   +5 more sources

N=2 Supersymmetry and U(1)-Duality [PDF]

open access: bronze, 2012
Understanding the consequences of the E_{7(7)} duality on the UV properties of N=8 supergravity requires unravelling when and how duality-covariant actions can be constructed so as to accommodate duality-invariant counter-terms.
Johannes Broedel   +4 more
semanticscholar   +3 more sources

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