On the brane coupling of unified orbifolds with gauge interactions in the bulk

Diamandis, G.A.; Georgalas, B.C.; Kouroumalou, P.; Lahanas, A.B.

doi:10.1016/j.physletb.2004.09.069

Cited by 13 publications

(22 citation statements)

References 56 publications

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“…Here ∆(y) = e 5 5 δ(y) is the modified Dirac delta function which satisfies the normalization conditions +πR −πR dy e 5 5 ∆(y) = 1, +πR −πR dy e 5 5 = L where L is the 5 dimensional volume. The Chern-Simons terms can be gauged away assuming cubic constraints [24,25] and Z 2 symmetry. It is useful to define the five dimensional generalized Kähler function(G) in this context as [24,25]…”

Section: Appendixmentioning

confidence: 99%

“…Subsequently, in order to incorporate observationally constraint cosmology of the brane, a fine tuning between the brane tension of the visible and invisible brane has been proposed [23]. It has been pointed out in [24,25] how the radion coupled with bulk fields may give rise to an effective inflaton field on the brane. In the same vein, we construct the brane inflaton potential of our consideration starting from 5D SUGRA.…”

Section: Introductionmentioning

confidence: 99%

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Brane inflation in background supergravity

Choudhury¹,

Pal²

2012

Phys. Rev. D

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We propose a model of inflation in the framework of brane cosmology driven by background supergravity. Starting from bulk supergravity we construct the inflaton potential on the brane and employ it to investigate for the consequences to inflationary paradigm. To this end, we derive the expressions for the important parameters in brane inflation, which are somewhat different from their counterparts in standard cosmology, using the one loop radiative corrected potential. We further estimate the observable parameters and find them to fit well with recent observational data by confronting with WMAP7 using CAMB. We also analyze the typical energy scale of brane inflation with our model, which resonates well with present estimates from cosmology and standard model of particle physics.Comment: 14 pages, 7 figures, 1 table, some minor corrections in the text, Abstract slightly modified, Accepted for publication in Physical Review

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Section: Appendixmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Brane inflation in background supergravity

Choudhury¹,

Pal²

2012

Phys. Rev. D

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“…(The coupling of brane-localized matter to the bulk supergravity in five dimensions is discussed in Refs. [29,30,31,32,33,34]. )…”

Section: Modified Supersymmetry Transformationsmentioning

confidence: 99%

Boundary conditions in supergravity on a manifold with boundary

Belyaev¹

2006

J. High Energy Phys.

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We explain why it is necessary to use boundary conditions in the proof of supersymmetry of a supergravity action on a manifold with boundary. Working in both boundary ("downstairs") and orbifold ("upstairs") pictures, we present a bulk-plus-boundary/brane action for the five-dimensional (on-shell) supergravity which is supersymmetric with the use of fewer boundary conditions than were previously employed. The required Gibbons-Hawkinglike Y -term and many other aspects of the boundary/orbifold picture correspondence are discussed. * Present address: DESY-T, Notkestrasse 85, 22603 Hamburg, Germany 1 The spinors ΨMi and Hi are symplectic Majorana (see Appendix A). The index i can be rotated by Ui j ∈ SU (2): Ψ ′ i = Ui j Ψj. The (global) SU (2) is the automorphism symmetry group of the algebra when λ q = 0. The real vector q = (q1, q2, q3) indicates which U (1) subgroup of the SU (2) has been gauged [16,7]. One can set it to be a unit vector, q 2 = 1. 2 The algebra closes exactly only on the bosonic fields e A M and BM . For the gravitino, ΨMi, additional non-closure terms appear, proportional to its equation of motion. For the off-shell supersymmetry algebra see Ref. [18].

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“…The Kähler potential of the 4d supergravity can be found by matching with the kinetic terms for those fields. The kinetic terms for the metric component are obtained by inserting the background (14) into the 5d Einstein-Hilbert action,…”

Section: Four-dimensional Effective Supergravitymentioning

confidence: 99%

On the one-loop Kähler potential in five-dimensional brane-world supergravity

Falkowski

2005

J. High Energy Phys.

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We present an on-shell formulation of 5d gauged supergravity coupled to chiral matter multiplets localized at the orbifold fixed points. The brane action is constructed via the Noether method. In such set-up we compute one-loop corrections to the Kähler potential of the effective 4d supergravity and compare the result with previous computations based on the off-shell formalism. The results agree at lowest order in brane sources, however at higher order there are differences. We explain this discrepancy by an ambiguity in resolving singularities associated with the presence of infinitely thin branes.

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On the brane coupling of unified orbifolds with gauge interactions in the bulk

Cited by 13 publications

References 56 publications

Brane inflation in background supergravity

Brane inflation in background supergravity

Boundary conditions in supergravity on a manifold with boundary

On the one-loop Kähler potential in five-dimensional brane-world supergravity

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