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arxiv 1702.02768 v2 pith:XEEAYXTO submitted 2017-02-09 hep-ph astro-ph.CO

Dark matter in the Sun: scattering off electrons vs nucleons

classification hep-ph astro-ph.CO
keywords interactionselectronsnucleonscapturescatteringannihilationcasecross
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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The annihilation of dark matter (DM) particles accumulated in the Sun could produce a flux of neutrinos, which is potentially detectable with neutrino detectors/telescopes and the DM elastic scattering cross section can be constrained. Although the process of DM capture in astrophysical objects like the Sun is commonly assumed to be due to interactions only with nucleons, there are scenarios in which tree-level DM couplings to quarks are absent, and even if loop-induced interactions with nucleons are allowed, scatterings off electrons could be the dominant capture mechanism. We consider this possibility and study in detail all the ingredients necessary to compute the neutrino production rates from DM annihilations in the Sun (capture, annihilation and evaporation rates) for velocity-independent and isotropic, velocity-dependent and isotropic and momentum-dependent scattering cross sections for DM interactions with electrons and compare them with the results obtained for the case of interactions with nucleons. Moreover, we improve the usual calculations in a number of ways and provide analytical expressions in three appendices. Interestingly, we find that the evaporation mass in the case of interactions with electrons could be below the GeV range, depending on the high-velocity tail of the DM distribution in the Sun, which would open a new mass window for searching for this type of scenarios.

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Cited by 3 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. Constraints and Projections for Millicharged Dark Matter in the Sun with Water Cherenkov Neutrino Detectors

    hep-ph 2026-06 unverdicted novelty 5.0

    Super-Kamiokande constrains millicharged dark matter at 5-28 GeV for fractional abundance 10^{-4.5}; Hyper-Kamiokande reaches down to 5x10^{-6}.

  2. Super-Kamiokande Strongly Constrains Leptophilic Dark Matter Capture in the Sun

    astro-ph.HE 2025-01 unverdicted novelty 5.0

    Super-Kamiokande data constrains the DM-electron scattering cross-section for leptophilic dark matter to ~4e-41 cm2 below 100 GeV, exceeding direct detection by over an order of magnitude.

  3. Constraining dark matter self-interaction from kinetic heating in neutron stars

    hep-ph 2026-04 unverdicted novelty 4.0

    Observation of neutron stars at 1000-1200 K could constrain asymmetric dark matter self-interaction cross-sections by two orders of magnitude beyond bullet cluster limits.