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Dark Matter decay to neutrinos
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abstract
It is possible that the strongest interactions between dark matter and the Standard Model occur via the neutrino sector. Unlike gamma rays and charged particles, neutrinos provide a unique avenue to probe for astrophysical sources of dark matter, since they arrive unimpeded and undeflected from their sources. Previously, we reported on annihilations of dark matter to neutrinos; here, we review constraints on the decay of dark matter into neutrinos over a range of dark matter masses from MeV to ZeV, compiling previously reported limits, exploring new electroweak corrections and computing constraints where none have been computed before. We examine the expected contributions to the neutrino flux at current and upcoming neutrino experiments as well as photons from electroweak emission expected at gamma-ray telescopes, leading to constraints on the dark matter decay lifetime, which ranges from $\tau \sim 1.2\times10^{21}$ s at 10~MeV to $1.5\times10^{29}$~s at 1~PeV.
Forward citations
Cited by 6 Pith papers
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Search for GeV-scale Dark Matter from the Galactic Center with IceCube-DeepCore
Using 9.28 years of IceCube-DeepCore data, no dark-matter neutrino signal is found from the Galactic Center, setting the strongest neutrino-telescope limits for GeV-scale annihilation and decay.
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Interpreting the Hubble tension with a cascade decaying dark matter sector
A cascade decaying dark matter model combining early and late effects still cannot reduce the Hubble tension below about 3 sigma, and is statistically disfavored relative to Lambda CDM.
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New Constraints on Neutrino-Dark Matter Interactions: A Comprehensive Analysis
Most benchmark neutrino-dark matter couplings adopted in previous studies are excluded when laboratory meson and Z decay bounds are combined with cosmological and astrophysical constraints, leaving only special galact...
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The QCD Axion and Neutrino Masses
If the QCD axion and neutrino masses share a single symmetry-breaking scale, the axion necessarily couples to neutrinos and can decay into a monochromatic neutrino signal.
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Minimal Majoron Dark Matter from a Discrete $Z_N$ Gauge Symmetry
Discrete Z_N-protected majoron dark matter excludes Z_5, leaves Z_7/Z_11/Z_13 viable, and predicts a 1–10 MeV Z_7 majoron testable by COSI through 511 keV and γγ lines.
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Breaking Dark: Hunting Heavy Decaying Dark Matter with Tibet AS$_\gamma$ and LHAASO-KM2A
Tibet ASγ and LHAASO-KM2A diffuse gamma-ray data exclude decaying dark matter lifetimes below about 10^28 seconds for masses around 10^6-10^9 GeV, for many Standard Model final states.
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