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Energy Radiation by Cosmic Superstrings in Brane Inflation
High Energy Physics - Theory · Submitted 25 Oct 2007
abstract compiled · 2026-09-23 · no language-model review
The authors' main claim It is shown that the energy loss via Ramond-Ramond field radiation can dominate by many orders of magnitude over the energy radiation via gravitational wave emission.
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The abstract, sentence by sentence
The dominant method of energy loss by a loop of cosmic D-strings in models of warped brane inflation is studied. It is shown that the energy loss via Ramond-Ramond field radiation can dominate by many orders of magnitude over the energy radiation via gravitational wave emission. The ratio of these two energy loss mechanisms depends on the energy scale of inflation, the mass scale of string theory and whether it is a single-throat or a multi-throat inflationary scenario. This can have important consequences for the detection of cosmic superstrings in the near future. It is argued that the bounds from cosmic microwave background anisotropies and big bang nucleosynthesis are the dominant cosmological sources to constrain the physical parameters of the network of cosmic superstrings, whereas the role of the gravitational wave-based experiments may be secondary.
background contribution method result interpretation main claim
| # | sentence | role | the authors' own work | states the main conclusion | strength |
|---|---|---|---|---|---|
| s0 | The dominant method of energy loss by a loop of cosmic D-strings in models of warped brane inflation is studied. | contribution 0.98 | 0.69 | 0.05 | asserted 0.67 |
| s1 | It is shown that the energy loss via Ramond-Ramond field radiation can dominate by many orders of magnitude over the energy radiation via gravitational wave emission. | result 1.00 | 0.86 | 0.82 | asserted 1.00 |
| s2 | The ratio of these two energy loss mechanisms depends on the energy scale of inflation, the mass scale of string theory and whether it is a single-throat or a multi-throat inflationary scenario. | result 0.89 | 0.62 | 0.11 | asserted 0.99 |
| s3 | This can have important consequences for the detection of cosmic superstrings in the near future. | interpretation 1.00 | 0.16 | 0.07 | hedged possibility 0.89 |
| s4 | It is argued that the bounds from cosmic microwave background anisotropies and big bang nucleosynthesis are the dominant cosmological sources to constrain the physical parameters of the network of cosmic superstrings, whereas the role of the gravitational wave-based experiments may be secondary. | interpretation 0.96 | 0.37 | 0.25 | hedged possibility 0.52 |
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The paper
Original abstract
The dominant method of energy loss by a loop of cosmic D-strings in models of warped brane inflation is studied. It is shown that the energy loss via Ramond-Ramond field radiation can dominate by many orders of magnitude over the energy radiation via gravitational wave emission. The ratio of these two energy loss mechanisms depends on the energy scale of inflation, the mass scale of string theory and whether it is a single-throat or a multi-throat inflationary scenario. This can have important consequences for the detection of cosmic superstrings in the near future. It is argued that the bounds from cosmic microwave background anisotropies and big bang nucleosynthesis are the dominant cosmological sources to constrain the physical parameters of the network of cosmic superstrings, whereas the role of the gravitational wave-based experiments may be secondary.
Human review
How the literature uses it
11 arXiv papers cite this in 31 sentences
Papers citing it · 25 sentences without a confident label
Contests it 1 paper
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However, taking the details of the string compactification into account leads to difficulties with the argument in Ref. [ref] .
Theoretical constraints on brane inflation and cosmic superstring radiation · Allowed radiation from cosmic superstrings in a throat · contest 0.80
Compares with it 1 paper
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It appears in the ten-dimensional (Einstein-frame) action as follows [The IIB action can also be given in $SL(2, ℤ)$ invariant form in terms of $G_3 = F_3 - τH_3$ where $τ= C_0 + ie^-ϕ$, but we consider the D- and F-string cases separately here.]: [equation] where $H = dB$ and the $S_local$ part of the action is given by [equation] Following Ref. [ref] we compare the four-dimensional action to that in Ref. [ref] , finding (we have to take $B_2 →B̃_2 = (M_P/2) √(β/g_s) B_2$): [equation] Then from Eqs. ([ref]) and ([ref]), the ratio $P_NS/P_g$ goes like $g_s^3$: [equation] so this radiation is suppressed compared to the RR particle radiation.
Theoretical constraints on brane inflation and cosmic superstring radiation · NS particle emission · 0.83
Cites it as background 3 papers
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Many studies have been done on cosmic superstring networks, their evolution [ref] and radiation [ref] .
Theoretical constraints on brane inflation and cosmic superstring radiation · Introduction · 0.99
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Different theoretical aspects of $(p,q)$ string construction were studied in [ref] while the cosmological evolution of a string network with junctions has been investigated in [ref] .
Cosmic Strings Collision in Cosmological Backgrounds · Introduction · 0.99
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Different theoretical aspects of $(p,q)$ string construction were studied in [ref] while the cosmological evolution of a string network with junctions has been investigated in [ref] .
Zipping and Unzipping of Cosmic String Loops in Collision · Introduction · 1.00
What it cites · 9 sentences without a confident label
Uses data or values from 3 papers
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Taking the large value for $α$ suggested recently [ref] , $α∼0.1$, and assuming $ρ_RR/ρ_γ< 1/10$, we obtain
Scaling of cosmic string loops · BBN Constraints · 0.96
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Recent bounds from WMAP and the abundance of the light elements impose the constraint $δN_ν<0.85$ [ref] (depending on how one fits the data, the bound can be even tighter).
New BBN limits on Physics Beyond the Standard Model from He4 · BBN Constraints · 0.95
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The recent bound on strings tension from CMB anisotropies is $Gμ_eff < 10^-7$ [ref] , which is consistent with Eq. ([ref]).
Bounds on Cosmic Strings from WMAP and SDSS · BBN Constraints · 0.83
Cites as background 8 papers
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The question of power radiation via massive dilaton by strings loops was studied in [ref] .
Cosmic Strings and the String Dilaton · conclusions · 0.94
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The magnitude of the loop parameter $α$ for gauge cosmic strings is under debate in recent literature [ref] .
Cosmic String Loops and Gravitational Radiation · BBN Constraints · 0.93
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A particular well-studied model of the throat is the Klebanov-Strassler (KS) solution [ref] .
Supergravity and a Confining Gauge Theory: Duality Cascades and $\chi$SB-Resolution of Naked Singularities · Compactification · 1.00
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