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Compensation for large tensor modes with iso-curvature perturbations in CMB anisotropies

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Masahiro Kawasaki, Shuichiro Yokoyama

Cosmology and Nongalactic Astrophysics · Submitted 24 Mar 2014

abstract compiled · 2026-09-23 · no language-model review

The authors' main claim To realize such a suppression, we consider anti-correlated iso-curvature perturbations which could be realized in the simple curvaton model.

how it is stated · hedged possibility 0.99 read the record →

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arXiv ID1403.5823 (version 3)
Pith IDZOHDGL7I, Pith's permanent record of this paper and its review
CitationMasahiro Kawasaki, Shuichiro Yokoyama. "Compensation for large tensor modes with iso-curvature perturbations in CMB anisotropies." arXiv:1403.5823 (2014). https://pith.science/paper/ZOHDGL7I
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The compiled record

The paper's own sentences, arranged. Each label is drawn from a closed vocabulary; the number beside it is the probability the classifier gave that label. Numbers in the tables are the authors', checked by code. No sentence in this record was written by a model.

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Compiled by classifier-1.13-20260917 via OpenRouter, question bank abstract-p1-20260923, 2026-09-23: 1 request, 3,053 input tokens, $0.0001 reported.

What the abstract itself states, as probabilities: claims first 0.03 · states limitation 0.11 · human participants 0.01 · controlled comparison 0.05 · randomized assignment 0.01 · states quantitative result 0.60 · compares with prior results 0.67 · mentions code or data availability 0.02.

The abstract, sentence by sentence

arXiv listing abstract v3. Results and the main claim are underlined; .

Recently, BICEP2 has reported the large tensor-to-scalar ratio $r=0.2^{+0.07}_{-0.05}$ from the observation of the cosmic microwave background (CMB) B-mode at degree-scales. Since tensor modes induce not only CMB B-mode but also the temperature fluctuations on large scales, to realize the consistent temperature fluctuations with the Planck result we should consider suppression of scalar perturbations on corresponding large scales. To realize such a suppression, we consider anti-correlated iso-curvature perturbations which could be realized in the simple curvaton model.

background contribution method result interpretation main claim

What the classifier reports for each sentence. The number is the probability it gave the label.
#sentencerolethe authors' own workstates the main conclusionstrength
s0 Recently, BICEP2 has reported the large tensor-to-scalar ratio $r=0.2^{+0.07}_{-0.05}$ from the observation of the cosmic microwave background (CMB) B-mode at degree-scales. background 0.99 0.04 0.04 asserted 1.00
s1 Since tensor modes induce not only CMB B-mode but also the temperature fluctuations on large scales, to realize the consistent temperature fluctuations with the Planck result we should consider suppression of scalar perturbations on corresponding large scales. background 0.84 0.10 0.17 asserted 0.85
s2 To realize such a suppression, we consider anti-correlated iso-curvature perturbations which could be realized in the simple curvaton model. method 0.75 0.41 0.25 hedged possibility 0.99

What kind of paper the classifier reports this is: theoretical result 0.93 · evidence from argument 0.61.

What was examined, and what was not

sources read
  • arXiv listing abstract v3
not examined
  • full text
  • figures and tables
  • references and citing sentences
  • relations to other papers
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  • P abstract
not run
  • S sections
  • T body sentences
  • C citations
  • R cross-paper relations

Every quoted sentence on this record is the authors'. Every label is from Pith's closed vocabulary, with the probability shown beside it. Every number in the measurements table is the authors', checked by code. Record as JSON

The paper
Original abstract

Recently, BICEP2 has reported the large tensor-to-scalar ratio $r=0.2^{+0.07}_{-0.05}$ from the observation of the cosmic microwave background (CMB) B-mode at degree-scales. Since tensor modes induce not only CMB B-mode but also the temperature fluctuations on large scales, to realize the consistent temperature fluctuations with the Planck result we should consider suppression of scalar perturbations on corresponding large scales. To realize such a suppression, we consider anti-correlated iso-curvature perturbations which could be realized in the simple curvaton model.

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References
How the literature uses it

17 arXiv papers cite this in 25 sentences

Each citing sentence is taken from the citing paper's LaTeX source and typed by Pith's classifier. A label appears at probability 0.8 or more (0.95 for support), a contest at 0.7 or more; the quoted words are the citing authors'. How each label was checked · JSON

Papers whose main result relates to this one's

Found among the papers closest to this one by title and main claim. Pith's classifier compared each pair's main results and a second model family confirmed the relation; checked against two further families, shown conflicts agreed 118 times in 120 and shown same results 218 times in 239. The quoted sentence is the other paper's main claim.

States the same result 1 paper

Papers citing it · 15 sentences without a confident label

Cites it as background 10 papers
  • To relieve this tension, some possible extensions to the $Λ$CDM+$r$ model have been discussed such as the ruining spectral index [ref] introduced by BICEP2 (see also in Refs. [ref] ), the additional relativistic degrees of freedom beyond the three active neutrinos and photons [ref] , the suppression of the adiabatic perturbations on large scales [ref] , the blue tilted tensor [ref] , and the isocurvature mode [ref] and so on.

    Reconciling the Tension Between Planck and BICEP2 Through Early Dark Energy · Introduction · 0.82

  • Inflationary modifications include a large running of the scalar tilt [ref] ; more explicit features in the inflationary scalar spectra [ref] ; or anticorrelated isocurvature perturbations [ref] .

    Neutrinos help reconcile Planck measurements with both Early and Local Universe · Introduction · 0.84

  • Some possible extensions of the model to resolve the tension have been discussed since the data release of BICEP2 such as the running spectral index [ref] , the suppression of the adiabatic perturbations on large scales [ref] , the presence of the extra relativistic particles [ref] , blue-tilted tensor spectrum [ref] , the existence of anti-correlated isocurvature mode [ref] , and so on.

    Isocurvature perturbations and tensor mode in light of Planck and BICEP2 · Introduction · 0.89

What it cites · 21 sentences without a confident label

Uses data or values from 3 papers
  • Although these papers used different parameterization from that used in Ref. [ref] , obtained results are consistent.], by using the WMAP3 and other data sets the constraints on the value of $B_m$ and $r$ are respectively given by $B_m cosθ_m ≥- 0.13$ and $r ≤0.49$.

    Cosmological Constraints on Isocurvature and Tensor Perturbations · Compensation caused by iso-curvature perturbations · 0.88

  • The latter gives the upper bound on the tensor-to-scalar ratio as $r < 0.11$ obtained from the combined analysis of the CMB temperature fluctuations and other data sets [ref] .

    Planck 2013 results. XVI. Cosmological parameters · Introduction · 0.85

  • The latter gives the upper bound on the tensor-to-scalar ratio as $r < 0.11$ obtained from the combined analysis of the CMB temperature fluctuations and other data sets [ref] .

    Planck 2013 results. XXII. Constraints on inflation · Introduction · 0.85

Cites as background 20 papers

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