Inflationary cosmology with five dimensional<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>SO</mml:mi><mml:mo>(</mml:mo><mml:mn>10</mml:mn><mml:mo>)</mml:mo><mml:mn /></mml:math>

Kyae, Bumseok; Shafi, Qaisar

doi:10.1103/physrevd.69.046004

Cited by 9 publications

(13 citation statements)

References 76 publications

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“…In the boundary conditions Eqs. (13) and (14), we note that 1 is never fixed by any Lagrangian parameter. Any arbitrary negative value of 1 allows a 4D flat space-time solution, by adjusting c ÿ in Eq.…”

Section: Self-tuning Of the Cosmological Constantmentioning

confidence: 95%

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Brane gravity, massless bulk scalar, and self-tuning of the cosmological constant

2004

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We show that a self-tuning mechanism of the cosmological constant could work in 5D noncompact space-time with a Z 2 symmetry in the presence of a massless scalar field. The standard model matter fields live only on the 4D brane. The change of vacuum energy on the brane (brane cosmological constant) by, for instance, electroweak and QCD phase transitions, just gives rise to dynamical shifts of the profiles of the background metric and the scalar field in the extra dimension, keeping 4D space-time flat without any fine-tuning. To avoid naked singularities in the bulk, the brane cosmological constant should be negative. We introduce an additional brane-localized 4D Einstein-Hilbert term so as to provide the observed 4D gravity with the noncompact extra dimension. With a general form of the brane-localized gravity term allowed by the symmetries, the low energy Einstein gravity is successfully reproduced on the brane at long distances. We show this phenomenon explicitly for the case of vanishing bulk cosmological constant.

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Section: Self-tuning Of the Cosmological Constantmentioning

confidence: 95%

“…Any arbitrary negative value of 1 allows a 4D flat space-time solution, by adjusting c ÿ in Eq. (13), and c and a in Eq. (14) such that the boundary conditions at the brane are fulfilled.…”

Section: Self-tuning Of the Cosmological Constantmentioning

confidence: 99%

Brane gravity, massless bulk scalar, and self-tuning of the cosmological constant

2004

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“…Note the similarity between the VEVs and the parity operators in Eqs. (14) and (15). As Moreover, the SO(10) × SO(10) can be broken to the intersection of two maximal sub-…”

Section: Breaking Via Pati-salammentioning

confidence: 96%

“…For a SO(10) model, if we choose P y the same as P ′ in Eqs. (14), (15) or (16), the SO(10) gauge symmetry is broken down to the SU(5) × U(1), flipped SU(5) × U(1) ′ , or the PS gauge symmetry respectively, for the zero modes.…”

Section: B High Dimensional Non-supersymmetric Guts With Wilson Linementioning

confidence: 99%

Supersymmetric models inspired by deconstruction

Huang

Jiang

2004

Nuclear Physics B

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We consider 4-dimensional N = 1 supersymmetric SO(10) models inspired by deconstruction of 5-dimensional N = 1 supersymmetric orbifold SO(10) models and high dimensional nonsupersymmetric SO(10) models with Wilson line gauge symmetry breaking. We discuss the SO(10) × SO(10) models with bi-fundamental link fields where the gauge symmetry can be broken down to the Pati-Salam, SU (5)×U (1), flipped SU (5)×U (1) ′ or the standard model like gauge symmetry. We also propose an SO(10)×SO(6)×SO(4) model with bi-fundamental link fields where the gauge symmetry is broken down to the Pati-Salam gauge symmetry, and an SO(10)×SO(10) model with bi-spinor link fields where the gauge symmetry is broken down to the flipped SU (5) × U (1) ′ gauge symmetry. In these two models, the Pati-Salam and flipped SU (5) × U (1) ′ gauge symmetry can be further broken down to the standard model gauge symmetry, the doublet-triplet splittings can be obtained by the missing partner mechanism, and the proton decay problem can be solved.We also study the gauge coupling unification. We briefly comment on the interesting variation models with gauge groups SO(10) × SO(6) and SO(10) × flipped SU (5) × U (1) ′ in which the proton decay problem can be solved.

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“…There are a number of natural choices for the gauge group G. As mentioned previously, G can be associated with a U(1) B−L symmetry, a case which is motivated in terms of generating the observed baryon asymmetry via leptogenesis. We may alternatively identify G with a GUT, such as SO (10) or SU(5) [24]. An attractive choice is the so-called flipped SU(5) model, SU(5)×U(1) X , which possesses a number of advantages over other models.…”

Section: Flipped Su(5)mentioning

confidence: 99%

Minimal Supersymmetric Hybrid Inflation, Flipped SU(5) and Proton Decay

Rehman,

Shafi,

Wickman

2009

Preprint

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Minimal supersymmetric hybrid inflation utilizes a canonical Kähler potential and a renormalizable superpotential which is uniquely determined by imposing a U(1) R-symmetry. In computing the scalar spectral index n s we take into account modifications of the tree level potential caused by radiative and supergravity corrections, as well as contributions from the soft supersymmetry breaking terms with a negative soft mass-squared term allowed for the inflaton. All of these contributions play a role in realizing n s values in the range 0.96-0.97 preferred by WMAP. The U(1) R-symmetry plays an important role in flipped SU(5) by eliminating the troublesome dimension five proton decay. The proton decays into e + π 0 via dimension six operators arising from the exchange of superheavy gauge bosons with a lifetime of order 10 34 -10 36 years.

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Inflationary cosmology with five dimensionalSO(10)

Cited by 9 publications

References 76 publications

Brane gravity, massless bulk scalar, and self-tuning of the cosmological constant

Brane gravity, massless bulk scalar, and self-tuning of the cosmological constant

Supersymmetric models inspired by deconstruction

Minimal Supersymmetric Hybrid Inflation, Flipped SU(5) and Proton Decay

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