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Cosmological constraints on a Peccei-Quinn flatino as the lightest supersymmetric particle
High Energy Physics - Phenomenology · Submitted 14 Aug 2000
abstract compiled · 2026-09-23 · no language-model review
The authors' main claim Then, the flatino LSP is a good dark matter candidate because the reheat temperature can be high enough to allow its production from the decay of the thermalized LSP, while low enough to prevent its overproduction from the decay of sfermions.
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The abstract, sentence by sentence
In an interesting class of models, non-renormalizable terms of the superpotential are responsible for the spontanteous breaking of Peccei-Quinn (PQ) symmetry as well as the generation of the $\mu$ term. The flaton fields which break PQ symmetry are accompanied by flatinos, and the lightest flatino (the LSP) can be the stable, while the decay of the lightest neutralino (the NLSP) might be visible at colliders with a low axion scale. We examine the cosmology of these models, involving thermal inflation just after the PQ phase transition. The branching ratio of flatons into axions must be small so as not to interfere with nucleosynthesis, and flatons must not decay into the LSP or it will be over-abundant. We explore a simple model,with light flatons which can decay into $Z$ or $W$ bosons, or into a light Higgs ($h^0$) plus a $Z$ boson, to show that such features can be realized in a wide range of parameter space. The mass of the NLSP can be as low as $(m_{h^0}+m_Z)/2$, with an axion scale of order $10^{10}$ GeV and a final reheat temperature typically of order $10\GeV$. Then, the flatino LSP is a good dark matter candidate because the reheat temperature can be high enough to allow its production from the decay of the thermalized LSP, while low enough to prevent its overproduction from the decay of sfermions.
background contribution method result interpretation main claim
| # | sentence | role | the authors' own work | states the main conclusion | strength |
|---|---|---|---|---|---|
| s0 | In an interesting class of models, non-renormalizable terms of the superpotential are responsible for the spontanteous breaking of Peccei-Quinn (PQ) symmetry as well as the generation of the $\mu$ term. | background 1.00 | 0.10 | 0.04 | asserted 0.98 |
| s1 | The flaton fields which break PQ symmetry are accompanied by flatinos, and the lightest flatino (the LSP) can be the stable, while the decay of the lightest neutralino (the NLSP) might be visible at colliders with a low axion scale. | background 0.94 | 0.12 | 0.13 | hedged possibility 0.72 |
| s2 | We examine the cosmology of these models, involving thermal inflation just after the PQ phase transition. | contribution 0.92 | 0.75 | 0.04 | asserted 0.83 |
| s3 | The branching ratio of flatons into axions must be small so as not to interfere with nucleosynthesis, and flatons must not decay into the LSP or it will be over-abundant. | result 0.56 | 0.30 | 0.13 | asserted 0.99 |
| s4 | We explore a simple model,with light flatons which can decay into $Z$ or $W$ bosons, or into a light Higgs ($h^0$) plus a $Z$ boson, to show that such features can be realized in a wide range of parameter space. | contribution 0.55 | 0.90 | 0.12 | asserted 0.72 |
| s5 | The mass of the NLSP can be as low as $(m_{h^0}+m_Z)/2$, with an axion scale of order $10^{10}$ GeV and a final reheat temperature typically of order $10\GeV$. | result 1.00 | 0.81 | 0.14 | asserted 0.54 |
| s6 | Then, the flatino LSP is a good dark matter candidate because the reheat temperature can be high enough to allow its production from the decay of the thermalized LSP, while low enough to prevent its overproduction from the decay of sfermions. | interpretation 0.89 | 0.72 | 0.55 | asserted 0.86 |
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The paper
Original abstract
In an interesting class of models, non-renormalizable terms of the superpotential are responsible for the spontanteous breaking of Peccei-Quinn (PQ) symmetry as well as the generation of the $\mu$ term. The flaton fields which break PQ symmetry are accompanied by flatinos, and the lightest flatino (the LSP) can be the stable, while the decay of the lightest neutralino (the NLSP) might be visible at colliders with a low axion scale. We examine the cosmology of these models, involving thermal inflation just after the PQ phase transition. The branching ratio of flatons into axions must be small so as not to interfere with nucleosynthesis, and flatons must not decay into the LSP or it will be over-abundant. We explore a simple model,with light flatons which can decay into $Z$ or $W$ bosons, or into a light Higgs ($h^0$) plus a $Z$ boson, to show that such features can be realized in a wide range of parameter space. The mass of the NLSP can be as low as $(m_{h^0}+m_Z)/2$, with an axion scale of order $10^{10}$ GeV and a final reheat temperature typically of order $10\GeV$. Then, the flatino LSP is a good dark matter candidate because the reheat temperature can be high enough to allow its production from the decay of the thermalized LSP, while low enough to prevent its overproduction from the decay of sfermions.
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References
How the literature uses it
7 arXiv papers cite this in 12 sentences
Papers citing it · 8 sentences without a confident label
Builds on it 1 paper
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In this paper, we consider the supersymmetric DFSZ axion model realized in the Kim-Nilles mechanism extending limited discussions in Refs. [ref] .
Dark matter in the Kim-Nilles mechanism · Introduction · 0.97
Uses its data or values 1 paper
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The axino energy density must be equal or smaller to the DM density $Ω_DM h^2 =0.110±0.006$ [ref] , and the resulting phenomenology was studied in [ref] .
Thermal production of axino Dark Matter · Thermal axino abundance · 0.91
Compares with it 1 paper
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Our model, though simpler, has much in common with the multi-field thermal inflation axion models studied in Refs. [ref] , and our baryogenesis scenario would probably work in those models too, but there are at least two important differences.
Thermal inflation, baryogenesis and axions · Comparison with multi-field thermal inflation axion models · 0.98
Cites it as background 1 paper
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We do not consider flaton models, or other scenarios in which PQ symmetry breaking is related to supersymmetry breaking [ref] .
Axion constraints in non-standard thermal histories · Axion production in non-standard thermal histories · 0.87
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