Spontaneous supersymmetry breaking in supersymmetric string theories

Rohm, Ryan

doi:10.1016/0550-3213(84)90007-5

Cited by 390 publications

(594 citation statements)

References 10 publications

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“…Thus we can see that this string model is equivalent to a Z N freely acting orbifold 7 . From this we speculate 8 that the limit R → 0 corresponds to the orbifold C/Z N .…”

Section: Two Dimensional Orbifolds From Melvin Backgroundmentioning

confidence: 98%

“…This model includes three parameters (two magnetic parameters and one compactification radius), and in most parts of the parameter space this non-supersymmetric model includes closed string tachyons. In particular at the special value of the magnetic fields with the small radius limit in type II theory the system is equivalent to type 0 string theory (see [7,8,9,10,11,12] and references there in). In this way type 0 string theory can be realized as a non-supersymmetric background in type II superstring.…”

Section: Introductionmentioning

confidence: 99%

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Orbifolds as Melvin geometry

Takayanagi

Uesugi

2001

J. High Energy Phys.

118

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In this paper we explicitly show that the various noncompact abelian orbifolds are realized as special limits of parameters in type II (NSNS) Melvin background and its higher dimensional generalizations. As a result the supersymmetric ALE spaces (A-type C 2 /Z N ) and nonsupersymmetric orbifolds in type II and type 0 theory are all connected with each other by the exactly marginal deformation. Our results provide new examples of the duality between type II and type 0 string theory. We also discuss the decay of unstable backgrounds in this model which include closed string tachyons.

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“…Thus we can see that this string model is equivalent to a Z N freely acting orbifold 7 . From this we speculate 8 that the limit R → 0 corresponds to the orbifold C/Z N .…”

Section: Two Dimensional Orbifolds From Melvin Backgroundmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Orbifolds as Melvin geometry

Takayanagi

Uesugi

2001

J. High Energy Phys.

118

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“…Rohm proposed a simple model of supersymmetry breaking in string theory [6]. Take Type II theory compactified on a circle, and impose antiperiodic (Scherk-Schwarz) boundary conditions on fermions.…”

Section: Rohm's Compactificationmentioning

confidence: 99%

Closed String Tachyons and Their Implications for Non-Supersymmetric Strings

Dine¹,

Gorbatov²,

Klebanov

et al. 2004

J. High Energy Phys.

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Closed string tachyons have long been somewhat mysterious. We note that there is often a regime in the classical moduli space in which one can systematically compute the effective action for such fields. In this regime, the tachyon is light, and cannot be integrated out. Instead, one must consider the combined dynamics of gravitons, moduli, tachyons and other light fields. We compute the action and find that the quartic term for the tachyon is positive in the field definition where the tachyon has no derivative coupling to the radion. We study the evolution of isotropic, homogeneous configurations and find that typically the system is driven to regions where the calculation is no longer under control.

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“…In a very similar way to the thermal supersymmetry breaking, string models with spontaneous breaking of supersymmetry can be constructed, adapting the Scherk-Schwarz mechanism [8] in superstrings [2,6,7,[9][10][11][12], which involves the introduction of non-trivial geometrical fluxes [13]. These fluxes can be described naturally in the framework of freely acting orbifolds [11].…”

Section: Introductionmentioning

confidence: 99%

Resolution of Hagedorn singularity in superstrings with gravito-magnetic fluxes

Angelantonj

Kounnas²,

Partouche³

et al. 2009

Nuclear Physics B

124

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We consider closed type II and orientifold backgrounds where supersymmetry is spontaneously broken by asymmetric geometrical fluxes. We show that these can be used to describe thermal ensembles with chemical potentials associated to "gravito-magnetic" fluxes. The thermal free energy is computed at the one-loop string level, and it is shown to be free of the usual Hagedorn-like instabilities for a certain choice of the chemical potentials. In the closed string gravitational sector, as well as in the open string matter sector of the proposed orientifold construction, the free energy turns out to have "Temperature duality" symmetry, F (T /T H ) = F (T H /T ), which requires interchanging the space-time spinor representations S ↔ C. For small temperatures, T → 0, the anti-spinor C decouples from the spectrum while for large temperatures, T → ∞, the spinor S decouples. In both limits the free energy vanishes, as we recover a conventional type II superstring theory. At the self dual point T = T H , the thermal spectra of S and C are identical. At this point there are extra massless scalars in the adjoint representation of an SO(4) non-Abelian gauge symmetry group arising from the closed-string sector.

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Spontaneous supersymmetry breaking in supersymmetric string theories

Cited by 390 publications

References 10 publications

Orbifolds as Melvin geometry

Orbifolds as Melvin geometry

Closed String Tachyons and Their Implications for Non-Supersymmetric Strings

Resolution of Hagedorn singularity in superstrings with gravito-magnetic fluxes

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