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Neutron Lifetime Discrepancy as a Sign of a Dark Sector?
High Energy Physics - Phenomenology · Submitted 1 Oct 2018
abstract compiled · 2026-09-23 · no language-model review
The authors' main claim We summarize our recent proposal of explaining the discrepancy between the bottle and beam measurements of the neutron lifetime through the existence of a dark sector, which the neutron can decay to with a branching fraction 1%.
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The abstract, sentence by sentence
We summarize our recent proposal of explaining the discrepancy between the bottle and beam measurements of the neutron lifetime through the existence of a dark sector, which the neutron can decay to with a branching fraction 1%. We show that viable particle physics models for such neutron dark decays can be constructed and we briefly comment on recent developments in this area.
background contribution method result interpretation main claim
| # | sentence | role | the authors' own work | states the main conclusion | strength |
|---|---|---|---|---|---|
| s0 | We summarize our recent proposal of explaining the discrepancy between the bottle and beam measurements of the neutron lifetime through the existence of a dark sector, which the neutron can decay to with a branching fraction 1%. | contribution 0.96 | 0.56 | 0.78 | asserted 0.54 |
| s1 | We show that viable particle physics models for such neutron dark decays can be constructed and we briefly comment on recent developments in this area. | contribution 0.96 | 0.79 | 0.16 | asserted 0.96 |
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The paper
Original abstract
We summarize our recent proposal of explaining the discrepancy between the bottle and beam measurements of the neutron lifetime through the existence of a dark sector, which the neutron can decay to with a branching fraction 1%. We show that viable particle physics models for such neutron dark decays can be constructed and we briefly comment on recent developments in this area.
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How the literature uses it
4 arXiv papers cite this in 9 sentences
Papers whose main result relates to this one's
States the same result 2 papers
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The difference between the outcomes of the two types of measurements is explained by the existence of a neutron dark decay channel with a branching fraction 1%.
Dark Side of the Neutron? · 0.99
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We propose to explain this anomaly by a dark decay channel for the neutron, involving one or more dark sector particles in the final state.
Dark Matter Interpretation of the Neutron Decay Anomaly · 0.91
Papers citing it · 6 sentences without a confident label
Cites it as background 3 papers
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Recently Fornal and Grinstein [ref] have proposed to explain the neutron lifetime anomaly, related to a discrepancy between experimental values of the neutron lifetime measured in bottle and beam experiments, through contributions of the neutron dark matter decay modes $n →χ+ γ$, $n →χ+ ϕ$ and $n →χ+γ^* →χ+ e^- + e^+$, where $χ$ and $ϕ$ are dark matter fermion and scalar boson, respectively, $γ$ and $γ^*$ are real and virtual photons, and $(e^- e^+)$ is the electron–positron pair.
Neutron Dark Matter Decays and Correlation Coefficients of Neutron Beta Decays · Introduction · 0.80
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The window for neutron dark decay width can be simply determined as the difference of the two observed values, [equation] For the neutron dark decay modes, there are many discussions in specific models, see [ref] and references therein, but there are few from the EFT perspective [ref] .
Dark Sector Effective Field Theory · Neutron lifetime anomaly from dark decay · 0.91
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Numerous studies have explored different possibilities [ref] .
Neutron Decay to a Non-Abelian Dark Sector · Introduction · 0.99
What it cites · 4 sentences without a confident label
Uses data or values from 1 paper
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In turn, a recent lattice calculation of $g_A$ [ref] yields $τ_n = 885 ±15 s$.
Simulating the weak death of the neutron in a femtoscale universe with near-Exascale computing · Neutron Lifetime · 0.93
Cites as background 1 paper
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$∙$ Baryogenesis It was argued in Ref. [ref] that the SIDM model with the neutron dark decay channel $n →χ A'$ can lead to low-scale baryogenesis.
Baryogenesis from neutron-dark matter oscillations · Theory and model building · 0.85
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