Open descendants of Z2×Z2 freely acting orbifolds

Antoniadis, I.; D’Appollonio, Giuseppe; Dudas, Emilian; Sagnotti, A.

doi:10.1016/s0550-3213(99)00616-1

Cited by 63 publications

(70 citation statements)

References 49 publications

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“…In [242] all the other details of this model have been worked out and supersymmetric Pati-Salam type models were constructed. In [243,244] it was shown that Z 2 × Z 2 shift orbifolds [245][246][247] do also admit rigid cycles.…”

Section: Rigid Three-cyclesmentioning

confidence: 99%

Four-dimensional string compactifications with D-branes, orientifolds and fluxes

Blumenhagen¹,

Körs²,

Lüst³

et al. 2007

Physics Reports

849

1,602

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This review article provides a pedagogical introduction into various classes of chiral string compactifications to four dimensions with D-branes and fluxes. The main concern is to provide all necessary technical tools to explicitly construct four-dimensional orientifold vacua, with the final aim to come as close as possible to the supersymmetric Standard Model. Furthermore, we outline the available methods to derive the resulting four-dimensional effective action. Finally, we summarize recent attempts to address the string vacuum problem via the statistical approach to D-brane models.

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Section: Rigid Three-cyclesmentioning

confidence: 99%

Four-dimensional string compactifications with D-branes, orientifolds and fluxes

Blumenhagen¹,

Körs²,

Lüst³

et al. 2007

Physics Reports

849

1,602

View full text Add to dashboard Cite

show abstract

“…In that case even in the presence of the orientifold, 4d N ≥ 2 supersymmetry is approximately recovered at points near the boundary of the moduli space where these vector states become light. Compactifications of this type were intensively studied for instance in [64][65][66][67], and the particular example of section 4.5 belongs to this class.…”

Section: Jhep09(2011)110mentioning

confidence: 99%

RR photons

Cámara

Ibáñez

Marchesano

2011

J. High Energ. Phys.

163

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Type II string compactifications to 4d generically contain massless RamondRamond U(1) gauge symmetries. However there is no massless matter charged under these U(1)'s, which makes a priori difficult to measure any physical consequences of their existence. There is however a window of opportunity if these RR U(1)'s mix with the hypercharge U(1) Y (hence with the photon). In this paper we study in detail different avenues by which U(1) RR bosons may mix with D-brane U(1)'s. We concentrate on Type IIA orientifolds and their M-theory lift, and provide geometric criteria for the existence of such mixing, which may occur either via standard kinetic mixing or via the mass terms induced by Stückelberg couplings. The latter case is particularly interesting, and appears whenever D-branes wrap torsional p-cycles in the compactification manifold. We also show that in the presence of torsional cycles discrete gauge symmetries and Aharanov-Bohm strings and particles appear in the 4d effective action, and that type IIA Stückelberg couplings can be understood in terms of torsional (co)homology in M-theory. We provide examples of Type IIA Calabi-Yau orientifolds in which the required torsional cycles exist and kinetic mixing induced by mass mixing is present. We discuss some phenomenological consequences of our findings. In particular, we find that mass mixing may induce corrections relevant for hypercharge gauge coupling unification in F-theory SU(5) GUT's.

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“…Thus, it has Hodge numbers (h (1,1) , h (2,1) ) = (3, 51), cf. [28,29], and the Euler number is χ = −96, the wrong sign to achieve volume stabilization along the lines outlined at the end of section 2. There do exist models with the right sign of the Euler number, such as T 6 /Z ′ 6 which we also considered in [1].…”

Section: Psfrag Replacementsmentioning

confidence: 99%

Stabilization of the Compactification Volume by Quantum Corrections

2006

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We discuss prospects for stabilizing the volume modulus of N = 1 supersymmetric type IIB orientifold compactifications using only perturbative corrections to the Kähler potential. Concretely, we consider the known string loop corrections and tree-level α ′ corrections. They break the no-scale structure of the potential, which otherwise prohibits stabilizing the volume modulus. We argue that when combined, these corrections provide enough flexibility to stabilize the volume of the internal space without nonperturbative effects, although we are not able to present a completely explicit example within the limited set of currently available models. Furthermore, a certain amount of fine-tuning is needed to obtain a minimum at large volume.

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Open descendants of Z2×Z2 freely acting orbifolds

Cited by 63 publications

References 49 publications

Four-dimensional string compactifications with D-branes, orientifolds and fluxes

Four-dimensional string compactifications with D-branes, orientifolds and fluxes

RR photons

Stabilization of the Compactification Volume by Quantum Corrections

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