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Boundary Inflation and the WMAP Data
Astrophysics · Submitted 23 Sep 2005
abstract compiled · 2026-09-23 · no language-model review
The authors' main claim We find a marginalized probability bound for the associated Eddington parameter at the end of inflation 1 - gamma < 0.002, at 95% confidence level.
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The abstract, sentence by sentence
Inflation in a five-dimensional brane world model with two boundary branes is studied. We make use of the moduli space approximation whereby the low energy theory reduces to a four-dimensional biscalar-tensor gravity plus a minimally coupled scalar field. After a detailed analysis of the inflationary solutions, we derive the evolution equations of the linear perturbations separating the adiabatic mode from two entropy modes. We then examine the primordial scalar and tensor power spectra and show that their tilt depends on the scalar-tensor coupling constant. Finally, the induced CMB anisotropies are computed and we present a Monte Carlo Markov Chains exploration of the parameter space using the first year WMAP data. We find a marginalized probability bound for the associated Eddington parameter at the end of inflation 1 - gamma < 0.002, at 95% confidence level. This suggests that future CMB data could provide crucial information helping to distinguish scalar-tensor and standard inflationary scenarios.
background contribution method result interpretation main claim
| # | sentence | role | the authors' own work | states the main conclusion | strength |
|---|---|---|---|---|---|
| s0 | Inflation in a five-dimensional brane world model with two boundary branes is studied. | contribution 0.86 | 0.80 | 0.02 | asserted 0.84 |
| s1 | We make use of the moduli space approximation whereby the low energy theory reduces to a four-dimensional biscalar-tensor gravity plus a minimally coupled scalar field. | method 1.00 | 0.82 | 0.02 | asserted 1.00 |
| s2 | After a detailed analysis of the inflationary solutions, we derive the evolution equations of the linear perturbations separating the adiabatic mode from two entropy modes. | method 0.66 | 0.96 | 0.03 | asserted 1.00 |
| s3 | We then examine the primordial scalar and tensor power spectra and show that their tilt depends on the scalar-tensor coupling constant. | result 0.91 | 0.95 | 0.07 | asserted 1.00 |
| s4 | Finally, the induced CMB anisotropies are computed and we present a Monte Carlo Markov Chains exploration of the parameter space using the first year WMAP data. | method 0.94 | 0.96 | 0.05 | asserted 1.00 |
| s5 | We find a marginalized probability bound for the associated Eddington parameter at the end of inflation 1 - gamma < 0.002, at 95% confidence level. | result 1.00 | 0.96 | 0.61 | asserted 1.00 |
| s6 | This suggests that future CMB data could provide crucial information helping to distinguish scalar-tensor and standard inflationary scenarios. | interpretation 0.96 | 0.40 | 0.46 | hedged possibility 1.00 |
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The paper
Original abstract
Inflation in a five-dimensional brane world model with two boundary branes is studied. We make use of the moduli space approximation whereby the low energy theory reduces to a four-dimensional biscalar-tensor gravity plus a minimally coupled scalar field. After a detailed analysis of the inflationary solutions, we derive the evolution equations of the linear perturbations separating the adiabatic mode from two entropy modes. We then examine the primordial scalar and tensor power spectra and show that their tilt depends on the scalar-tensor coupling constant. Finally, the induced CMB anisotropies are computed and we present a Monte Carlo Markov Chains exploration of the parameter space using the first year WMAP data. We find a marginalized probability bound for the associated Eddington parameter at the end of inflation 1 - gamma < 0.002, at 95% confidence level. This suggests that future CMB data could provide crucial information helping to distinguish scalar-tensor and standard inflationary scenarios.
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References
How the literature uses it
7 arXiv papers cite this in 9 sentences
Papers citing it · 6 sentences without a confident label
Compares with it 1 paper
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Equations ([ref]) can be compared to restrictions on the inflaton mass coming from the WMAP data [ref] , for the same inflationary model as the one we consider here, namely:
Lattice Refining Loop Quantum Cosmology and Inflation · Discussion/Conclusions · 0.99
Cites it as background 2 papers
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Several aspects of this class of models have been thoroughly investigated over the last few years, among them: Braneworld inflation [ref] , their low energy dynamics [ref] , brane collisions [ref] , and various phenomenological aspects [ref] .
On Newton's law in supersymmetric braneworld models · 5-D supergravity · 0.99
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.05truecm It is a pleasure to thank Christophe Ringeval for bringing to our attention Ref. [ref] .
Lattice Refining Loop Quantum Cosmology and Inflation · Discussion/Conclusions · 0.88
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