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Fluxbranes: Moduli Stabilisation and Inflation
High Energy Physics - Theory · Submitted 11 Jul 2012
abstract compiled · 2026-09-23 · no language-model review
The authors' main claim Subsequently, we combine this moduli stabilisation with the fluxbrane inflation idea, demonstrating in particular that CMB data (including cosmic string constraints) can be explained within our setup of hierarchical large volume CY compactifications.
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The abstract, sentence by sentence
Fluxbrane inflation is a stringy version of D-term inflation in which two fluxed D7-branes move towards each other until their (relative) gauge flux annihilates. Compared to brane-antibrane inflation, the leading-order inflationary potential of this scenario is much flatter. In the present paper we first discuss a new explicit moduli stabilisation procedure combining the F- and D-term scalar potentials: It is based on fluxed D7-branes in a geometry with three large four-cycles of hierarchically different volumes. Subsequently, we combine this moduli stabilisation with the fluxbrane inflation idea, demonstrating in particular that CMB data (including cosmic string constraints) can be explained within our setup of hierarchical large volume CY compactifications. We also indicate how the eta-problem is expected to re-emerge through higher-order corrections and how it might be overcome by further refinements of our model. Finally, we explain why recently raised concerns about constant FI terms do not affect the consistent, string-derived variant of D-term inflation discussed in this paper.
background contribution method result interpretation main claim
| # | sentence | role | the authors' own work | states the main conclusion | strength |
|---|---|---|---|---|---|
| s0 | Fluxbrane inflation is a stringy version of D-term inflation in which two fluxed D7-branes move towards each other until their (relative) gauge flux annihilates. | background 0.99 | 0.10 | 0.04 | asserted 1.00 |
| s1 | Compared to brane-antibrane inflation, the leading-order inflationary potential of this scenario is much flatter. | background 0.60 | 0.42 | 0.05 | asserted 1.00 |
| s2 | In the present paper we first discuss a new explicit moduli stabilisation procedure combining the F- and D-term scalar potentials: It is based on fluxed D7-branes in a geometry with three large four-cycles of hierarchically different volumes. | contribution 0.59 | 0.92 | 0.10 | asserted 1.00 |
| s3 | Subsequently, we combine this moduli stabilisation with the fluxbrane inflation idea, demonstrating in particular that CMB data (including cosmic string constraints) can be explained within our setup of hierarchical large volume CY compactifications. | result 0.62 | 0.94 | 0.65 | asserted 0.98 |
| s4 | We also indicate how the eta-problem is expected to re-emerge through higher-order corrections and how it might be overcome by further refinements of our model. | limitation 0.72 | 0.66 | 0.04 | hedged possibility 0.73 |
| s5 | Finally, we explain why recently raised concerns about constant FI terms do not affect the consistent, string-derived variant of D-term inflation discussed in this paper. | contribution 0.63 | 0.72 | 0.09 | asserted 0.99 |
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The paper
Original abstract
Fluxbrane inflation is a stringy version of D-term inflation in which two fluxed D7-branes move towards each other until their (relative) gauge flux annihilates. Compared to brane-antibrane inflation, the leading-order inflationary potential of this scenario is much flatter. In the present paper we first discuss a new explicit moduli stabilisation procedure combining the F- and D-term scalar potentials: It is based on fluxed D7-branes in a geometry with three large four-cycles of hierarchically different volumes. Subsequently, we combine this moduli stabilisation with the fluxbrane inflation idea, demonstrating in particular that CMB data (including cosmic string constraints) can be explained within our setup of hierarchical large volume CY compactifications. We also indicate how the eta-problem is expected to re-emerge through higher-order corrections and how it might be overcome by further refinements of our model. Finally, we explain why recently raised concerns about constant FI terms do not affect the consistent, string-derived variant of D-term inflation discussed in this paper.
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References
How the literature uses it
16 arXiv papers cite this in 46 sentences
Papers citing it · 36 sentences without a confident label
Builds on it 2 papers
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In particular, in pheno we discuss the D7-D7 moduli space and its generic scalar potential in more detail than in our previous publications on the subject [ref] .
D7-Brane Moduli Space in Axion Monodromy and Fluxbrane Inflation · Brief Summary of our Results · 0.84
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Therefore, it should allow to include the inflationary models considered in [ref] .
Special Points of Inflation in Flux Compactifications · Generalization to F-theory · 0.85
Cites it as support 3 papers
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Next consider the brane deformation moduli $ζ, ζ$ where, as we will argue, a shift symmetry does indeed exist (cf. [ref] ).
The Higgs mass from a String-Theoretic Perspective · Shift symmetry: Wilson-lines vs. brane-deformations · 0.97
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A point that will become important below is that $V_0$ is parametrically smaller than the terms in the off-shell potential [ref] by a factor $g_s$.[This was also pointed out in [ref] .] Indeed, using $τ_s∼𝒪(1)/g_s$ in $V_0$, one finds $V_0 ∼√(g_s)|W_0|^2/𝒱^3$.
LVS de Sitter Vacua are probably in the Swampland · LVS Potential · 0.96
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Nevertheless, as already noted in [ref] , the shift symmetry will not simply be lost, but is just obscured by the choice of coordinates.
D7-Brane Moduli Space in Axion Monodromy and Fluxbrane Inflation · The Effect of Coordinate Shifts on Flat Directions · 0.96
Cites it as background 5 papers
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Fluxbrane inflation [ref] is a stringy version of supersymmetric hybrid natural inflation [ref] .
D7-Brane Moduli Space in Axion Monodromy and Fluxbrane Inflation · Supersymmetric Hybrid Natural Inflation and its Stringy Embedding · 0.93
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Fluxbrane inflation [ref] is a hybrid inflation scenario in string theory in which the inflaton field is the separation of a pair of spacetime-filling D7-branes.
Monodromy Charge in D7-brane Inflation · Comment on fluxbrane inflation · 1.00
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We wish to clarify whether a field-dependent FI term can play the role of an effective constant which drives inflation.[For alternative and recent attempts to reconcile inflation with field-dependent FI terms, see [ref] .] In the case of DHI we discuss a series of obstacles which prevent possible setups from resembling the simple controllable model introduced in [ref] .
Inflation with Fayet-Iliopoulos Terms · Introduction · 0.88
What it cites · 144 sentences without a confident label
Contests 1 paper
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The second, D3/D7 inflation [ref] , has serious issues which we aim to overcome: In D3/D7 inflation, supersymmetry is broken by non-selfdual flux on the D7-brane.
D3/D7 Inflationary Model and M-theory · Introduction · contest 0.75
Uses the method or tool of 1 paper
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We first put our $D$-term potential in the standard $N=1$ supergravity form following [ref] : Let $D_j$ be a divisor with dual 2-form $[D_j]$ and let the fluxed D7-brane be wrapped on a divisor $D_$.
Gaugino Condensates and D-terms from D7-branes · Moduli Masses in Fluxbrane Moduli Stabilisation · 0.95
Uses data or values from 4 papers
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For instance, the manifold $𝐏^4_[1,1,1,6,9]$ of [ref] , on which the large volume scenario was first constructed explicitly, has 272 complex structure moduli.
Systematics of Moduli Stabilisation in Calabi-Yau Flux Compactifications · $F$-Term Scalar Potential · 0.86
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In the example of a toroidal compactification with $(1)$ values of the complex structure the functions $^KK, W$ were calculated to be of the order $10^-2$ (see e.g. [ref] ).
On Volume Stabilization by Quantum Corrections · String Loop Corrections · 0.95
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Here and in the next section we take $κ_bbb = 5$ which is, for example, the triple self-intersection number of the quintic [ref] and appropriate blow-ups thereof [ref] . ] and $A_s = 1$ we find that for $_min. = 1.7×10^6$ the parameters can be chosen to lie in the phenomenologically viable regime (see figure [ref]): A value $ξ= 0.1$ implies $g_s ≃0.25$.
Global F-theory GUTs · A Two-Modulus Fluxbrane Inflation Model · 0.85
Compares with 2 papers
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Assuming $n_+ ∼c ∼κ_bbb ∼τ_s ∼1$ this suggests that, at least in rough numerical agreement with [ref] , a fairly large $V$ can indeed be tolerated in spite of the `parametrical' clash between $m_3/2$ and $$.
Moduli Stabilisation and de Sitter String Vacua from Magnetised D7 Branes · A Two-Modulus Fluxbrane Inflation Model · 0.84
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As it turns out, this realisation of D3/D7 inflation suffers from a similar problem as the brane-antibrane proposal [ref] , i.e. the potential is too steep.
The Inflationary Brane-Antibrane Universe · Introduction · 0.93
Cites as support 3 papers
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This would not only be potentially inconsistent, it turns out to be technically impossible in models where no FI term is originally present [ref] .
Comments on the Fayet-Iliopoulos Term in Field Theory and Supergravity · Issues in String $D$-Terms · 0.99
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This would not only be potentially inconsistent, it turns out to be technically impossible in models where no FI term is originally present [ref] .
Comments on Supercurrent Multiplets, Supersymmetric Field Theories and Supergravity · Issues in String $D$-Terms · 0.99
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This would not only be potentially inconsistent, it turns out to be technically impossible in models where no FI term is originally present [ref] .
Fayet-Iliopoulos Terms in Supergravity and Cosmology · Issues in String $D$-Terms · 0.99
Cites as background 50 papers
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Fluxbrane inflation [ref] is a stringy realisation of $D$-term hybrid inflation [ref] .
Hybrid Inflation from Supergravity D Terms · Phenomenological Requirements · 0.80
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Fluxbrane inflation [ref] is a stringy realisation of $D$-term hybrid inflation [ref] .
D-Term Inflation · Phenomenological Requirements · 0.80
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Fluxbrane inflation [ref] is a stringy realisation of $D$-term hybrid inflation [ref] .
Fluxbrane Inflation · Phenomenological Requirements · 0.80
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