Note on Four D<i>p</i>-Branes at Angles

We present supersymmetry breaking four dimensional orientifolds of type IIA strings. The compact space is a torus times a four dimensional orbifold. The orientifold group reflects one direction in each torus. RR tadpoles are cancelled by D6-branes intersecting at angles in the torus and in the orbifold. The angles are chosen such that supersymmetry is broken. The resulting four dimensional theories contain chiral fermions. The tadpole cancellation conditions imply that there are no non-abelian gauge anomalies. The models also contain anomaly-free U (1) factors.

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“…Such scenarios are e.g. discussed in [41][42][43][44][45][46]. We will mainly focus on the constructions in [41] and [44].…”

Section: Introductionmentioning

confidence: 99%

Orientifolds with branes at angles

Förste¹,

Honecker²,

Schreyer³

2001

J. High Energy Phys.

108

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“…Configurations with more than two branes intersecting with each other at angles, in only one plane, were considered in[16].…”

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confidence: 99%

Recombination of Intersecting D-Branes and Cosmological Inflation

Gómez–Reino

Zavala

2002

J. High Energy Phys.

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We consider the interactions between Dp-branes intersecting at an arbitrary number of angles in the context of type-II string theory. For cosmology purposes we concentrate in the theory on R 3,1 × T 6 . Interpreting the distance between the branes as the inflaton field, the branes can intersect at most at two angles on the compact space. If the configuration is non supersymmetric we will have an interbrane potential that provides an effective cosmological inflationary epoch at the four-dimensional intersection between the branes. The end of inflation occurs when the interbrane distance becomes small compared with the string scale, where a tachyon develops triggering the recombination of the branes. We study this recombination due to tachyon instabilities and we find the possibility for the final configuration to be again branes intersecting at two angles. This preserves the interesting features that are present in the intersecting brane models from the string model building point of view also after the end of inflation. This fact was not present in the models of branes intersecting at just one angle. This kind of recombination can be also important in other string contexts.

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“…The worldsheet fermionic partners obey the following mode expansions: 33) in the R sector and 34) in the NS sector of the theory. The ladder operators satisfy the following non-trivial commutation relations:…”

Section: D=4 Orbifolds With D-branesmentioning

confidence: 99%

Tadpole and Anomaly Cancellation Conditions in D-Brane Orbifold Models

Angulo

Bailin

Yang

2003

Int. J. Mod. Phys. A

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We derive and generalize the RR twisted tadpole cancellation conditions necessary to obtain consistent D = 4, ZN orbifold compactifications of Type IIB string theory. At least two different types of branes (or antibranes with opposite RR charges) are introduced into the construction. The matter spectra and their contribution to the non-abelian gauge anomalies are computed. Their relation with the tadpole cancellation conditions is also reviewed. The presence of tachyons is a common feature for some of the non-supersymmetric systems of branes.

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Note on Four Dp-Branes at Angles

Cited by 16 publications

References 33 publications

Orientifolds with branes at angles

Orientifolds with branes at angles

Recombination of Intersecting D-Branes and Cosmological Inflation

Tadpole and Anomaly Cancellation Conditions in D-Brane Orbifold Models

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