Discrete deformations in Type I vacua

Angelantonj, Carlo; Blumenhagen, Ralph

doi:10.1016/s0370-2693(99)01480-x

Cited by 62 publications

(93 citation statements)

References 11 publications

(28 reference statements)

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“…This issue has been discussed in detail e.g. in [70,71]. the geometric action on mesons, which can be obtained using rules similar to those of fixed point orientifolds.…”

Section: Few Examples and The Geometric Actionmentioning

confidence: 99%

Dimers and orientifolds

Franco

Hanany

Krefl

et al. 2007

J. High Energy Phys.

222

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We introduce new techniques based on brane tilings to investigate D3-branes probing orientifolds of toric Calabi-Yau singularities. With these new tools, one can write down many orientifold models and derive the resulting low-energy gauge theories living on the D-branes. Using the set of ideas in this paper one recovers essentially all orientifolded theories known so far. Furthermore, new orientifolds of non-orbifold toric singularities are obtained. The possible applications of the tools presented in this paper are diverse. One particular application is the construction of models which feature dynamical supersymmetry breaking as well as the computation of D-instanton induced superpotential terms.

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“…This issue has been discussed in detail e.g. in [70,71]. the geometric action on mesons, which can be obtained using rules similar to those of fixed point orientifolds.…”

Section: Few Examples and The Geometric Actionmentioning

confidence: 99%

Dimers and orientifolds

Franco

Hanany

Krefl

et al. 2007

J. High Energy Phys.

222

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“…Let us now consider a lattice similar to (45), but which does not factorise under the action of the Z 2 × Z 2 orbifold …”

Section: Non Factorisable Latticesmentioning

confidence: 99%

“…In [43] these results have been extended to the case of T 4 /Z N orientifolds, while in [44] a more detailed analysis was performed and carried further to four dimensional compactifications as well. Finally, in [45] the connection with type IIA orientifolds through T-dualities was discussed.…”

Section: Introductionmentioning

confidence: 99%

Orientifold's landscape: non-factorisable six-tori

Förste¹,

Zavala²,

Timirgaziu

2007

J. High Energy Phys.

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We construct type IIA orientifolds on T 6 /Z 2 × Z 2 which admit non factorisable lattices. We describe a method to deal with this kind of configurations and discuss how the compactification lattice affects the tadpole cancellation conditions. Moreover, we include D6-branes which are not parallel to O6-planes. These branes can give rise to chiral spectra in four dimensions, thus uncovering a new corner in the landscape of intersecting D-brane model constructions. We demonstrate the construction at an explicit example. In general we argue that obtaining an odd number of families is

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“…Consequently, models with all tori orthogonal lead to an even number of families. Hence, we consider models with one tilted T 2 , where the tilting parameter is discrete and has a unique nontrivial value [31]. This mildly modifies the closed string sector, but has an important impact on the open string sector.…”

mentioning

confidence: 99%

Three-Family Supersymmetric Standardlike Models from Intersecting Brane Worlds

2001

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We construct the first three family N 1 supersymmetric string model with standard model gauge group SU͑3͒ C 3 SU͑2͒ L 3 U͑1͒ Y from an orientifold of type IIA theory on T 6 ͑͞Z 2 3 Z 2 ͒ and D6-branes intersecting at angles. In addition to the minimal supersymmetric standard model particles, the model contains right-handed neutrinos, a chiral (but anomaly-free) set of exotic multiplets, and extra vectorlike multiplets. We discuss some phenomenological features of this model. DOI: 10.1103/PhysRevLett.87.201801 PACS numbers: 11.10.Kk, 11.25.Mj, 12.60.Jv, 98.80.Cq The space of classical string vacua is highly degenerate, and at present we are unable to make definitive statements about how the string vacuum describing our universe is selected. Nonetheless, one can use phenomenological constraints as guidelines to construct semirealistic string models and explore, with judicious assumptions, the resulting phenomenology. The purpose of such explorations is, of course, not to find the model which would fully describe our world, but to examine the generic features of these string derived solutions.Until a few years ago, such explorations were carried out mainly in the framework of weakly coupled heterotic string theory. Indeed, a number of semirealistic string models have been constructed and analyzed [1]. However, an important lesson from string duality is that these models represent only a corner of M theory -the string vacuum describing our world may well be in a completely different regime in which the perturbative description of heterotic string theory breaks down [2]. Fortunately, the advent of D-branes allows for the construction of semirealistic string models in another calculable regime, as illustrated by the various four-dimensional N 1 supersymmetric type II orientifolds ([3-12] and references therein) constructed using conformal field theory techniques. However, the constraints on supersymmetric fourdimensional models are rather restrictive, leading to not fully realistic gauge sectors and matter contents. Motivated by the search for standard model-like solutions, several discrete or continuous deformations of this class of models have been explored. They include the following: (i) blowing-up of orientifold singularities [13,14], (ii) locating the branes at different points in the internal space (see, e.g., [9,12,15]) which in a T -dual picture corresponds to turning on continuous or discrete Wilson lines, (iii) introduction of discrete values for the Neveu-Schwarz -Neveu-Schwarz (NS-NS) B field [7,16] which in the T-dual picture corresponds to tilting the compactification tori, (iv) introduction of gauge fluxes in the D-brane world volumes (see [17] for an earlier discussion, and [18,19] for supersymmetric D 6 models), which in the T -dual version corresponds to D-branes intersecting at angles (hence closely related to models in [20,21]).An appealing feature of (iv) is that generically, there exists chiral fermions where D-branes intersect [22]. Their multiplicity is hence determined by a topological q...

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Discrete deformations in Type I vacua

Cited by 62 publications

References 11 publications

Dimers and orientifolds

Dimers and orientifolds

Orientifold's landscape: non-factorisable six-tori

Three-Family Supersymmetric Standardlike Models from Intersecting Brane Worlds

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