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Big-bang nucleosynthesis through bound-state effects with a long-lived slepton in the NMSSM
High Energy Physics - Phenomenology · Submitted 6 Mar 2014
abstract compiled · 2026-09-23 · no language-model review
The authors' main claim We show that the Li problems can be solved in the next-to-minimal supersymmetric standard model where the slepton as the next-to-lightest SUSY particle is very long-lived.
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The abstract, sentence by sentence
We show that the Li problems can be solved in the next-to-minimal supersymmetric standard model where the slepton as the next-to-lightest SUSY particle is very long-lived. Such a long-lived slepton induces exotic nuclear reactions in big-bang nucleosynthesis, and destroys and produces the $^7$Li and $^6$Li nuclei via bound state formation. We study cases where the lightest SUSY particle is singlino-like neutralino and bino-like neutralino to present allowed regions in the parameter space which is consistent with the observations on the dark matter and the Higgs mass.
background contribution method result interpretation main claim
| # | sentence | role | the authors' own work | states the main conclusion | strength |
|---|---|---|---|---|---|
| s0 | We show that the Li problems can be solved in the next-to-minimal supersymmetric standard model where the slepton as the next-to-lightest SUSY particle is very long-lived. | result 0.88 | 0.91 | 0.87 | asserted 1.00 |
| s1 | Such a long-lived slepton induces exotic nuclear reactions in big-bang nucleosynthesis, and destroys and produces the $^7$Li and $^6$Li nuclei via bound state formation. | method 0.43 | 0.49 | 0.22 | asserted 1.00 |
| s2 | We study cases where the lightest SUSY particle is singlino-like neutralino and bino-like neutralino to present allowed regions in the parameter space which is consistent with the observations on the dark matter and the Higgs mass. | contribution 0.85 | 0.92 | 0.08 | asserted 0.83 |
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The paper
Original abstract
We show that the Li problems can be solved in the next-to-minimal supersymmetric standard model where the slepton as the next-to-lightest SUSY particle is very long-lived. Such a long-lived slepton induces exotic nuclear reactions in big-bang nucleosynthesis, and destroys and produces the $^7$Li and $^6$Li nuclei via bound state formation. We study cases where the lightest SUSY particle is singlino-like neutralino and bino-like neutralino to present allowed regions in the parameter space which is consistent with the observations on the dark matter and the Higgs mass.
Human review
How the literature uses it
1 arXiv paper cite this in 1 sentence
What it cites · 41 sentences without a confident label
Uses the method or tool of 1 paper
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In the calculation, we use MicrOMEGAs [ref] included in NMSSMTools.
micrOMEGAs3.1 : a program for calculating dark matter observables · Selection of parameter sets · 1.00
Uses data or values from 10 papers
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The timescale to form bound state ($^7$Be $l̃^-$) is $O(10^3)$ s [ref] .
Big-bang nucleosynthesis and the relic abundance of dark matter in a stau-neutralino coannihilation scenario · Exotic BBN reactions · 0.98
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We adopt following observational bounds on light element abundances: the lithium 7 to hydrogen ratio $Log_10(^7Li/H) = -9.63 ±0.06$ [ref] , the lithium 6 to lithium 7 ratio $^6$Li/$^7$Li $= 0.046 ±0.022$ [ref] , the deuterium to hydrogen ratio D/H = $(2.80 ±0.20) ×10^-5$ [ref] , and the helium 3 to deuterium ratio $^3$He/D $<$ 0.87 + 0.27 [ref] .
Lithium isotopic abundances in metal-poor halo stars · Constraints from BBN · 1.00
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The standard calculation predicts the ratio of abundance $Log_10(^7Li/H)$ to be $-9.35±0.06$ [ref] , while the observation indicates $-9.63 ±0.06$ [ref] .
Big-bang nucleosynthesis with a long-lived charged massive particle including $^4$He spallation processes · Introduction · 0.87
Compares with 2 papers
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Indeed, the results at BL-1, BL-2, and BL-3 are almost same as the result in the MSSM, Fig. 3 in Ref. [ref] , where the same values for $c_e, m_χ̃^0_1, sinθ_f$ and CP-violating phase are used.
Big-bang nucleosynthesis with a long-lived charged massive particle including $^4$He spallation processes · BBN results at the benchmark points · 1.00
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This result is similar to that in the MSSM, Fig. 4 (middle panel) in Ref. [ref] , where same values for $c_e, m_χ̃^0_1, sinθ_f$ and CP-violating phase are used.
Allowed slepton intergenerational mixing in light of light element abundances · BBN results at the benchmark points · 1.00
Cites as background 5 papers
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The last one is the $^4$He spallation processes [ref] :
Big-bang nucleosynthesis with a long-lived charged massive particle including $^4$He spallation processes · Exotic BBN reactions · 0.81
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Among such questions is the nature of dark matter; it became a compelling question during this decade after the precise observations of the universe reported their results [ref] .
Planck 2013 results. XVI. Cosmological parameters · Introduction · 0.91
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Among such questions is the nature of dark matter; it became a compelling question during this decade after the precise observations of the universe reported their results [ref] .
Nine-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Final Maps and Results · Introduction · 0.91
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