Astrophysics · arXiv:astro-ph/0312607 v3 · submitted 23 Dec 2003
Cosmology of the Mirror Universe
The paper says
“Confronting with the present observational data, we show that for x < 0.3 the dark matter could be constituted entirely by mirror baryons, since in this case mirror baryons at linear scales behave essentially like cold dark matter (CDM) and substantial deviations are expected only at smaller scales which have undergone non-linear growth from relatively large redshifts.”
from the abstract · picked out as the main claim by a classifier
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The paper
Abstract
We describe the implications on the structure formation, the cosmic microwave background (CMB) and the large scale structure (LSS) for a Universe in which a significant part of dark matter is made of mirror baryons. Being the microphysics of the mirror baryons identical to the one of the usual baryons, we need only two extra thermodynamical parameters to describe our model: the temperature of the mirror plasma (limited by the BBN) and the amount of mirror baryonic matter. We extend the Jeans theory in order to study the structure formation mechanism in linear regime. Using a numerical code, we compute the temporal evolution of perturbations, the CMB anisotropies and the LSS power spectra. We show as the decoupling time and the dissipative Silk scale of the mirror baryons (both being different than for the ordinary ones) are key features for the evolution of a Mirror Universe, and induces specific signatures on the power spectra. We analyse the dependence of both CMB and LSS spectra on the mirror sector temperature and on the amount of mirror baryons. Confronting with the present observational data, we show that for x < 0.3 the dark matter could be constituted entirely by mirror baryons, since in this case mirror baryons at linear scales behave essentially like cold dark matter (CDM) and substantial deviations are expected only at smaller scales which have undergone non-linear growth from relatively large redshifts. In the case of x > 0.3 the pattern of the LSS power spectrum excludes the possibility of dark matter consisting entirely of mirror baryons, but they could present as admixture to the conventional CDM.
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. No sentence in this record was written by a model.
abstract compiled · 2026-09-23 · no language-model review
How the main claim is stated: hedged possibility 0.81
What the abstract itself states, as probabilities: claims first 0.03 · states limitation 0.70 · human participants 0.01 · controlled comparison 0.13 · randomized assignment 0.01 · states quantitative result 0.95 · compares with prior results 0.32 · mentions code or data availability 0.03
The abstract, sentence by sentence
This table labels the abstract only (arXiv listing abstract v3). The number is the probability the classifier gave the label.
| Sentence | Role | The authors' own work | States the main conclusion | Strength |
|---|---|---|---|---|
| We describe the implications on the structure formation, the cosmic microwave background (CMB) and the large scale structure (LSS) for a Universe in which a significant part of dark matter is made of mirror baryons. | contribution 0.99 | 0.69 | 0.07 | asserted 0.63 |
| Being the microphysics of the mirror baryons identical to the one of the usual baryons, we need only two extra thermodynamical parameters to describe our model: the temperature of the mirror plasma (limited by the BBN) and the amount of mirror baryonic matter. | method 0.82 | 0.28 | 0.03 | asserted 1.00 |
| We extend the Jeans theory in order to study the structure formation mechanism in linear regime. | method 0.93 | 0.92 | 0.02 | asserted 0.88 |
| Using a numerical code, we compute the temporal evolution of perturbations, the CMB anisotropies and the LSS power spectra. | method 0.98 | 0.96 | 0.03 | asserted 0.98 |
| We show as the decoupling time and the dissipative Silk scale of the mirror baryons (both being different than for the ordinary ones) are key features for the evolution of a Mirror Universe, and induces specific signatures on the power spectra. | result 0.73 | 0.84 | 0.12 | asserted 1.00 |
| We analyse the dependence of both CMB and LSS spectra on the mirror sector temperature and on the amount of mirror baryons. | contribution 0.83 | 0.93 | 0.06 | asserted 0.75 |
| Confronting with the present observational data, we show that for x < 0.3 the dark matter could be constituted entirely by mirror baryons, since in this case mirror baryons at linear scales behave essentially like cold dark matter (CDM) and substantial deviations are expected only at smaller scales which have undergone non-linear growth from relatively large redshifts. | result 0.90 | 0.93 | 0.58 | hedged possibility 0.81 |
| In the case of x > 0.3 the pattern of the LSS power spectrum excludes the possibility of dark matter consisting entirely of mirror baryons, but they could present as admixture to the conventional CDM. | result 0.84 | 0.90 | 0.24 | asserted 0.63 |
What kind of paper the classifier reports this is: simulation study 0.64 · evidence from simulation or computation 0.97
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
Levels run
- P abstract
Not run
- S sections
- T body sentences
- C citations
- R cross-paper relations
How the labels were made
Compiled by classifier-1.13.0 via TypeSafe API, question bank abstract-p1-20260923, 2026-09-23: 1 request, 6,520 input tokens.
Every quoted sentence on this record is the authors'. Every label is from Pith's closed vocabulary, with the probability shown beside it. This record as JSON
Cited by 5 Pith papers
Reviewed papers on Pith that cite this one. The full citation record
- Structure Formation with Mirror Dark Matter: CMB and LSS astro-ph · Dec 2003
- Effects of mirror dark matter on neutron stars astro-ph · Sep 2008
- Have neutron stars a dark matter core? astro-ph.HE · May 2010
- Cosmology with Mirror Dark Matter astro-ph.CO · Feb 2011
- Mirror particles and mirror matter: 50 years of speculation and search hep-ph · Jun 2006
How the literature uses it
6 arXiv papers cite this in 13 sentences
Papers citing it · 9 sentences without a confident label
Cites it as background 4 papers
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For a review see Ref. [ref] and for cosmological consequences Refs. [ref] .
Have neutron stars a dark matter core? · Introduction · 1.00
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While we have taken the initial mirror energy density to vanish for simplicity, it would be interesting to explore cosmological histories which do have some early nonzero mirror energy density, either from reheating or produced via feeble kinetic mixing (see e.g. [ref] for some related work).
The Hydrogen Mixing Portal, Its Origins, and Its Cosmological Effects · Mirror Sector Cosmology · 0.86
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Their idea was later developed by other authors [ref] , and a lot of studies were devoted to it, showing its compatibility with all the available experimental and observational constraints (for reviews, see Refs. [ref] ).
Is dark matter made of mirror matter? Evidence from cosmological data · Introduction · 0.87
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