pith. sign in

arxiv: 2501.14864 · v3 · pith:H5QN6ABBnew · submitted 2025-01-24 · 🌌 astro-ph.HE · astro-ph.SR· hep-ph

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

Pith reviewed 2026-05-23 04:35 UTC · model grok-4.3

classification 🌌 astro-ph.HE astro-ph.SRhep-ph
keywords leptophilic dark mattersolar captureneutrino fluxSuper-Kamiokandedark matter-electron scatteringdirect detectionSun
0
0 comments X

The pith

Super-Kamiokande data from the Sun constrains dark matter-electron scattering cross sections to ~4×10^{-41} cm² for masses below 100 GeV.

A machine-rendered reading of the paper's core claim, the machinery that carries it, and where it could break.

The paper establishes that the Sun captures leptophilic dark matter through scattering off electrons, and if that dark matter annihilates to leptons it produces a neutrino flux. Ten years of Super-Kamiokande observations are used to derive upper limits on the scattering cross section. These limits surpass those from terrestrial direct detection experiments by more than an order of magnitude in the sub-100 GeV mass range. A sympathetic reader would care because the Sun functions as a large-volume target that can probe interaction strengths inaccessible to lab detectors. The result applies specifically to models where dark matter interacts primarily with leptons and annihilates into neutrino-producing channels.

Core claim

Using 10 years of Super-Kamiokande observations, we set constraints on the dark-matter/electron scattering cross-section that exceed terrestrial direct detection searches by more than an order of magnitude for dark matter masses below 100 GeV, and reach cross-sections as low as ∼4×10^{-41}cm^{-2}.

What carries the argument

Solar capture of leptophilic dark matter via scattering on free electrons, followed by annihilation into leptonic final states that yield a detectable neutrino flux.

If this is right

  • For dark matter masses below 100 GeV the solar neutrino channel excludes scattering cross sections more than ten times smaller than current direct detection reach.
  • Cross sections down to approximately 4×10^{-41} cm^{-2} are ruled out for leptophilic models that annihilate to leptons.
  • The Sun serves as an effective target for leptophilic dark matter that would otherwise be hard to detect in underground experiments.

Where Pith is reading between the lines

These are editorial extensions of the paper, not claims the author makes directly.

  • Non-observation of solar neutrinos can exclude regions of leptophilic parameter space that remain open to laboratory searches.
  • The same capture-and-annihilation logic could be applied to other neutrino telescopes to extend the mass and cross-section coverage.
  • If leptophilic dark matter exists near the reported limit, next-generation neutrino detectors should see a corresponding solar signal.

Load-bearing premise

Leptophilic dark matter captured in the Sun must annihilate into leptonic states that produce a detectable neutrino flux.

What would settle it

A confirmed neutrino excess from the Sun whose spectrum and rate match the expected signal from dark matter annihilation at a scattering cross section above 4×10^{-41} cm² for a mass below 100 GeV.

Figures

Figures reproduced from arXiv: 2501.14864 by Axel Widmark, Pierluca Carenza, Thong T.Q. Nguyen, Tim Linden.

Figure 1
Figure 1. Figure 1: FIG. 1. ( [PITH_FULL_IMAGE:figures/full_fig_p001_1.png] view at source ↗
Figure 2
Figure 2. Figure 2: FIG. 2. The number of solar dark matter neutrino events for 10 yr exposures with Super-K (solid) and Hyper-K (dashed), [PITH_FULL_IMAGE:figures/full_fig_p003_2.png] view at source ↗
Figure 3
Figure 3. Figure 3: FIG. 3. Our Super-K constraints and Hyper-K projections compared with previous work, Super-K (lime) data down to 10 GeV [PITH_FULL_IMAGE:figures/full_fig_p004_3.png] view at source ↗
Figure 4
Figure 4. Figure 4: FIG. 4. Super-K and Hyper-K [PITH_FULL_IMAGE:figures/full_fig_p005_4.png] view at source ↗
read the original abstract

The Sun can efficiently capture leptophilic dark matter that scatters with free electrons. If this dark matter subsequently annihilates into leptonic states, it can produce a detectable neutrino flux. Using 10 years of Super-Kamiokande observations, we set constraints on the dark-matter/electron scattering cross-section that exceed terrestrial direct detection searches by more than an order of magnitude for dark matter masses below 100 GeV, and reach cross-sections as low as $\sim$4$\times$10$^{-41}$cm$^{-2}$.

Editorial analysis

A structured set of objections, weighed in public.

Desk editor's note, referee report, simulated authors' rebuttal, and a circularity audit. Tearing a paper down is the easy half of reading it; the pith above is the substance, this is the friction.

Referee Report

0 major / 2 minor

Summary. The manuscript claims that 10 years of Super-Kamiokande data can be used to set upper limits on the DM-electron scattering cross section for leptophilic dark matter captured in the Sun. Under the assumption that the captured DM annihilates into leptonic final states that produce a detectable neutrino flux, the resulting limits are stronger than those from terrestrial direct-detection experiments by more than an order of magnitude for DM masses below 100 GeV and reach cross sections as low as ∼4×10^{-41} cm^{-2}.

Significance. If the analysis holds, the result illustrates the complementary power of solar-capture neutrino searches for leptophilic DM models, extending sensitivity below the reach of current direct-detection experiments in the sub-100 GeV range. The conditional framing of the annihilation channel is stated explicitly in the abstract.

minor comments (2)
  1. The abstract supplies the final numerical limit but contains no description of the analysis pipeline, background model, capture-rate formalism, or systematic uncertainties; while the full manuscript presumably contains these details, the abstract should at minimum indicate the key methodological ingredients so that the quoted bound can be evaluated at a glance.
  2. The central claim is explicitly conditional on leptophilic DM annihilating into leptonic states that yield neutrinos; this condition is stated upfront rather than hidden, so the reported cross-section limits apply only under that scenario.

Simulated Author's Rebuttal

0 responses · 0 unresolved

We thank the referee for their positive summary of the manuscript and for recommending minor revision. The report does not list any specific major comments.

Circularity Check

0 steps flagged

No significant circularity; data-driven limits under explicit condition

full rationale

The paper reports upper limits on the DM-electron scattering cross section derived from 10 years of Super-Kamiokande neutrino observations. The central result is conditional on leptophilic DM capture followed by annihilation into leptonic states that produce a detectable neutrino flux; this condition is stated explicitly in the abstract rather than derived internally. No equations, parameters, or results are shown to reduce by construction to fitted inputs, self-citations, or prior ansatze from the same authors. The derivation chain consists of standard capture-rate calculations and observational flux limits, which remain independent of the reported cross-section bounds.

Axiom & Free-Parameter Ledger

0 free parameters · 0 axioms · 0 invented entities

Abstract-only review supplies no information on free parameters, background assumptions, or new entities; ledger is therefore empty.

pith-pipeline@v0.9.0 · 5625 in / 1175 out tokens · 26794 ms · 2026-05-23T04:35:53.088034+00:00 · methodology

discussion (0)

Sign in with ORCID, Apple, or X to comment. Anyone can read and Pith papers without signing in.

Forward citations

Cited by 4 Pith papers

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

  1. Impact of Evaporation Barriers on Solar-Captured Dark Matter Distribution and Evaporation Mass

    hep-ph 2025-09 conditional novelty 7.0

    Orbit-space calculation shows that a smooth in-medium attraction barrier suppresses evaporation of solar-captured dark matter by reshaping near-threshold phase space and lowering the evaporation mass.

  2. Monochromatic neutrinos from scotogenic dark matter

    hep-ph 2026-05 conditional novelty 5.0

    A modified scotogenic model makes the lightest pseudo-Dirac singlet a dark matter candidate that annihilates mostly to neutrino pairs near threshold, reproducing the relic abundance while satisfying direct detection a...

  3. INTEGRAL, eROSITA and Voyager Constraints on Light Bosonic Dark Matter: ALPs, Dark Photons, Scalars, $B-L$ and $L_{i}-L_{j}$ Vectors

    hep-ph 2025-07 unverdicted novelty 5.0

    This work sets new upper limits on decay lifetimes and couplings for axion-like particles, dark photons, scalars, and B-L or L_i-L_j vector bosons using 511 keV line, X-ray continuum, and cosmic-ray flux observations.

  4. Monochromatic neutrinos from scotogenic dark matter

    hep-ph 2026-05 unverdicted novelty 4.0

    A variation of the scotogenic model makes the lightest pseudo-Dirac fermion singlet a dark matter candidate that annihilates with 90% branching ratio into neutrino pairs near threshold, yielding the observed relic abu...

Reference graph

Works this paper leans on

129 extracted references · 129 canonical work pages · cited by 3 Pith papers · 54 internal anchors

  1. [1]

    Particle Dark Matter: Evidence, Candidates and Constraints

    G. Bertone, D. Hooper, and J. Silk, Phys. Rept. 405, 279 (2005), arXiv:hep-ph/0404175

  2. [2]

    A History of Dark Matter

    G. Bertone and D. Hooper, Rev. Mod. Phys. 90, 045002 (2018), arXiv:1605.04909 [astro-ph.CO]

  3. [3]

    Dark Matter

    M. Cirelli, A. Strumia, and J. Zupan, (2024), arXiv:2406.01705 [hep-ph]

  4. [4]

    Kahn and T

    Y. Kahn and T. Lin, Rept. Prog. Phys. 85, 066901 (2022), arXiv:2108.03239 [hep-ph]. 11

  5. [5]

    Knapen, J

    S. Knapen, J. Kozaczuk, and T. Lin, Phys. Rev. D 104, 015031 (2021), arXiv:2101.08275 [hep-ph]

  6. [6]

    TASI lectures on dark matter models and direct detection

    T. Lin, PoS 333, 009 (2019), arXiv:1904.07915 [hep-ph]

  7. [7]

    Blanco, J

    C. Blanco, J. I. Collar, Y. Kahn, and B. Lillard, Phys. Rev. D 101, 056001 (2020), arXiv:1912.02822 [hep-ph]

  8. [8]

    Essig et al

    R. Essig et al. , in Snowmass 2021 (2022) arXiv:2203.08297 [hep-ph]

  9. [9]

    Aprileet al.(XENON), The XENONnT dark mat- ter experiment, Eur

    E. Aprile et al. (XENON), Eur. Phys. J. C 84, 784 (2024), arXiv:2402.10446 [physics.ins-det]

  10. [10]

    Aalbers et al

    J. Aalbers et al. (LZ), Commun. Phys. 7, 292 (2024), arXiv:2406.02441 [hep-ex]

  11. [11]

    Li et al

    S. Li et al. (PandaX), Phys. Rev. Lett. 130, 261001 (2023), arXiv:2212.10067 [hep-ex]

  12. [12]

    Detecting Dark Matter with Imploding Pulsars in the Galactic Center

    J. Bramante and T. Linden, Phys. Rev. Lett. 113, 191301 (2014), arXiv:1405.1031 [astro-ph.HE]

  13. [13]

    Dark Kinetic Heating of Neutron Stars and An Infrared Window On WIMPs, SIMPs, and Pure Higgsinos

    M. Baryakhtar, J. Bramante, S. W. Li, T. Linden, and N. Raj, Phys. Rev. Lett. 119, 131801 (2017), arXiv:1704.01577 [hep-ph]

  14. [14]

    P. J. Fox and E. Poppitz, Phys. Rev. D 79, 083528 (2009), arXiv:0811.0399 [hep-ph]

  15. [15]

    Gamma-ray and radio tests of the e+e- excess from DM annihilations

    G. Bertone, M. Cirelli, A. Strumia, and M. Taoso, JCAP 03, 009 (2009), arXiv:0811.3744 [astro-ph]

  16. [16]

    John and T

    I. John and T. Linden, Phys. Rev. D 108, 103022 (2023), arXiv:2304.07317 [hep-ph]

  17. [17]

    John and T

    I. John and T. Linden, JCAP 12, 007 (2021), arXiv:2107.10261 [astro-ph.HE]

  18. [18]

    Borah, N

    D. Borah, N. Das, S. Jahedi, and B. Thacker, JHEP 01, 074 (2025), arXiv:2408.14548 [hep-ph]

  19. [19]

    Barman, S

    B. Barman, S. Bhattacharya, S. Girmohanta, and S. Jahedi, JHEP 04, 146 (2022), arXiv:2109.10936 [hep-ph]

  20. [20]

    Decaying Dark Matter can explain the electron/positron excesses

    E. Nardi, F. Sannino, and A. Strumia, JCAP 01, 043 (2009), arXiv:0811.4153 [hep-ph]

  21. [21]

    J. F. Acevedo, J. Bramante, A. Goodman, J. Kopp, and T. Opferkuch, JCAP 04, 026 (2021), arXiv:2012.09176 [hep-ph]

  22. [22]

    Berlin and D

    A. Berlin and D. Hooper, Phys. Rev. D 110, 075018 (2024), arXiv:2407.04768 [hep-ph]

  23. [23]

    K.-W. Ng, K. A. Olive, and M. Srednicki, Phys. Lett. B 188, 138 (1987)

  24. [24]

    Chauhan, M

    B. Chauhan, M. H. Reno, C. Rott, and I. Sarcevic, JCAP 01, 030 (2024), arXiv:2308.16134 [hep-ph]

  25. [25]

    X. Chu, R. Garani, C. Garc´ ıa-Cely, and T. Hambye, JHEP 05, 045 (2024), arXiv:2402.18535 [hep-ph]

  26. [26]

    Dark matter in the Sun: scattering off electrons vs nucleons

    R. Garani and S. Palomares-Ruiz, JCAP 05, 007 (2017), arXiv:1702.02768 [hep-ph]

  27. [27]

    T. N. Maity, A. K. Saha, S. Mondal, and R. Laha, (2023), arXiv:2308.12336 [hep-ph]

  28. [28]

    Albert et al

    A. Albert et al. (HAWC), Phys. Rev. Lett. 131, 051201 (2023), arXiv:2212.00815 [astro-ph.HE]

  29. [29]

    M. U. Nisa, J. F. Beacom, S. Y. BenZvi, R. K. Leane, T. Linden, K. C. Y. Ng, A. H. G. Peter, and B. Zhou, (2019), arXiv:1903.06349 [astro-ph.HE]

  30. [30]

    Constraints on Spin-Dependent Dark Matter Scattering with Long-Lived Mediators from TeV Observations of the Sun with HAWC

    A. Albert et al. (HAWC), Phys. Rev. D 98, 123012 (2018), arXiv:1808.05624 [hep-ph]

  31. [31]

    Abbasi et al

    R. Abbasi et al. (IceCube), Phys. Rev. D 105, 062004 (2022), arXiv:2111.09970 [astro-ph.HE]

  32. [32]

    R. K. Leane, K. C. Y. Ng, and J. F. Beacom, Phys. Rev. D 95, 123016 (2017), arXiv:1703.04629 [astro-ph.HE]

  33. [33]

    N. F. Bell, M. J. Dolan, and S. Robles, JCAP 11, 004 (2021), arXiv:2107.04216 [hep-ph]

  34. [34]

    N. F. Bell and K. Petraki, JCAP 04, 003 (2011), arXiv:1102.2958 [hep-ph]

  35. [35]

    N. F. Bell, J. B. Dent, and I. W. Sanderson, Phys. Rev. D 104, 023024 (2021), arXiv:2103.16794 [hep-ph]

  36. [36]

    N. F. Bell, A. J. Brennan, and T. D. Jacques, JCAP 10, 045 (2012), arXiv:1206.2977 [hep-ph]

  37. [37]

    Niblaeus, A

    C. Niblaeus, A. Beniwal, and J. Edsjo, JCAP 11, 011 (2019), arXiv:1903.11363 [astro-ph.HE]

  38. [38]

    Neutrinos from cosmic ray interactions in the Sun

    J. Edsjo, J. Elevant, R. Enberg, and C. Niblaeus, JCAP 06, 033 (2017), arXiv:1704.02892 [astro-ph.HE]

  39. [39]

    D. Bose, T. N. Maity, and T. S. Ray, Phys. Rev. D 105, 123013 (2022), arXiv:2112.08286 [hep-ph]

  40. [40]

    M. G. Aartsen et al. (IceCube), JCAP 04, 022 (2016), arXiv:1601.00653 [hep-ph]

  41. [41]

    J. L. Feng, J. Smolinsky, and P. Tanedo, Phys. Rev. D 93, 115036 (2016), [Erratum: Phys.Rev.D 96, 099903 (2017)], arXiv:1602.01465 [hep-ph]

  42. [42]

    WIMP Annihilation and Cooling of Neutron Stars

    C. Kouvaris, Phys. Rev. D 77, 023006 (2008), arXiv:0708.2362 [astro-ph]

  43. [43]

    Probing Light Dark Matter via Evaporation from the Sun

    C. Kouvaris, Phys. Rev. D 92, 075001 (2015), arXiv:1506.04316 [hep-ph]

  44. [44]

    The Spectrum of Darkonium in the Sun

    C. Kouvaris, K. Langæble, and N. G. Nielsen, JCAP 10, 012 (2016), arXiv:1607.00374 [hep-ph]

  45. [45]

    Thermalization time scales for WIMP capture by the Sun in effective theories

    A. Widmark, JCAP 05, 046 (2017), arXiv:1703.06878 [hep-ph]

  46. [46]

    WIMP capture by the Sun in the effective theory of dark matter self-interactions

    R. Catena and A. Widmark, JCAP 12, 016 (2016), arXiv:1609.04825 [astro-ph.CO]

  47. [47]

    Does Solar Physics Provide Constraints to Weakly Interacting Massive Particles?

    A. Bottino, G. Fiorentini, N. Fornengo, B. Ricci, S. Scopel, and F. L. Villante, Phys. Rev. D 66, 053005 (2002), arXiv:hep-ph/0206211

  48. [48]

    A novel way of constraining WIMPs annihilations in the Sun: MeV neutrinos

    N. Bernal, J. Mart´ ın-Albo, and S. Palomares-Ruiz, JCAP 08, 011 (2013), arXiv:1208.0834 [hep-ph]

  49. [49]

    R. K. Leane, T. Linden, P. Mukhopadhyay, and N. Toro, Phys. Rev. D 103, 075030 (2021), arXiv:2101.12213 [astro- ph.HE]

  50. [50]

    R. K. Leane and J. Smirnov, JCAP 12, 040 (2023), arXiv:2309.00669 [hep-ph]

  51. [51]

    I. John, R. K. Leane, and T. Linden, (2024), arXiv:2405.12267 [astro-ph.HE]

  52. [52]

    I. John, R. K. Leane, and T. Linden, Phys. Rev. D 109, 123041 (2024), arXiv:2311.16228 [astro-ph.HE]

  53. [53]

    Ilie and C

    C. Ilie and C. Levy, Phys. Rev. D 104, 083033 (2021), arXiv:2105.09765 [astro-ph.CO]

  54. [54]

    Ilie, Astrophys

    C. Ilie, Astrophys. J. 970, 159 (2024), arXiv:2402.07713 [astro-ph.CO]

  55. [55]

    C. V. Cappiello, Phys. Rev. Lett. 130, 221001 (2023), arXiv:2301.07728 [hep-ph]

  56. [56]

    Krishna, R

    D. Krishna, R. Sherpa, A. K. Saha, T. N. Maity, R. Laha, and N. Raj, (2025), arXiv:2503.07713 [hep-ph]

  57. [57]

    Gould, Astrophys

    A. Gould, Astrophys. J. 321, 571 (1987)

  58. [58]

    T. T. Q. Nguyen and T. M. P. Tait, Phys. Rev. D 107, 115016 (2023), arXiv:2212.12547 [hep-ph]

  59. [59]

    R. K. Leane and J. Tong, (2024), arXiv:2405.05312 [hep-ph]

  60. [60]

    PPPC 4 DM ID: A Poor Particle Physicist Cookbook for Dark Matter Indirect Detection

    M. Cirelli, G. Corcella, A. Hektor, G. Hutsi, M. Kadastik, P. Panci, M. Raidal, F. Sala, and A. Strumia, JCAP 03, 051 (2011), [Erratum: JCAP 10, E01 (2012)], arXiv:1012.4515 [hep-ph]

  61. [61]

    PPPC 4 DM$\nu$: A Poor Particle Physicist Cookbook for Neutrinos from DM annihilations in the Sun

    P. Baratella, M. Cirelli, A. Hektor, J. Pata, M. Piibeleht, and A. Strumia, JCAP 03, 053 (2014), arXiv:1312.6408 [hep-ph]. 12

  62. [62]

    C. Rott, J. Siegal-Gaskins, and J. F. Beacom, Phys. Rev. D 88, 055005 (2013), arXiv:1208.0827 [astro-ph.HE]

  63. [63]

    Arina, M

    C. Arina, M. Di Mauro, N. Fornengo, J. Heisig, A. Jueid, and R. R. de Austri, JCAP 03, 035 (2024), arXiv:2312.01153 [astro-ph.HE]

  64. [64]

    C. W. Bauer, N. L. Rodd, and B. R. Webber, JHEP 06, 121 (2021), arXiv:2007.15001 [hep-ph]

  65. [65]

    Q. Liu, J. Lazar, C. A. Arg¨ uelles, and A. Kheirandish, JCAP 10, 043 (2020), arXiv:2007.15010 [hep-ph]

  66. [66]

    J. Kopp, V. Niro, T. Schwetz, and J. Zupan, Phys. Rev. D 80, 083502 (2009), arXiv:0907.3159 [hep-ph]

  67. [67]

    Shiozawa (Super-Kamiokande), Nucl

    M. Shiozawa (Super-Kamiokande), Nucl. Instrum. Meth. A 433, 240 (1999)

  68. [68]

    Application of machine learning techniques to lepton energy reconstruction in water Cherenkov detectors

    E. Drakopoulou, G. A. Cowan, M. D. Needham, S. Playfer, and M. Taani, JINST 13, P04009 (2018), arXiv:1710.05668 [physics.ins-det]

  69. [69]

    G.-L. Lin, T. T. L. Nguyen, M. Spinrath, T. D. H. Van, and T.-C. Wang, JCAP 08, 027 (2022), arXiv:2201.06733 [hep-ph]

  70. [70]

    Jiang et al

    M. Jiang et al. (Super-Kamiokande), PTEP 2019, 053F01 (2019), arXiv:1901.03230 [hep-ex]

  71. [71]

    Measurements of the atmospheric neutrino flux by Super-Kamiokande: energy spectra, geomagnetic effects, and solar modulation

    E. Richard et al. (Super-Kamiokande), Phys. Rev. D 94, 052001 (2016), arXiv:1510.08127 [hep-ex]

  72. [72]

    On the Sensitivity of L/E Analysis of Super-Kamiokande Atmospheric Neutrino Data to Neutrino Oscillation Part~1

    E. Konishi, Y. Minorikawa, V. I. Galkin, M. Ishiwata, I. Nakamura, N. Takahashi, M. Kato, and A. Misaki, (2010), arXiv:1007.3812 [hep-ex]

  73. [73]

    On the Relation between the True Directions of Neutrinos and the Reconstructed Directions of Neutrinos in L/E Analysis Performed by Super-Kamiokande Collaboration Part1

    E. Konishi, Y. Minorikawa, V. I. Galkin, M. Ishiwata, I. Nakamura, N. Takahashi, M. Kato, and A. Misaki (2011) arXiv:1108.1064 [hep-ex]

  74. [74]

    V. I. Galkin, A. M. Anokhina, E. Konishi, and A. Misaki, (2008), arXiv:0808.0824 [hep-ex]

  75. [75]

    Robles and S

    S. Robles and S. A. Meighen-Berger, (2024), arXiv:2411.04435 [hep-ph]

  76. [76]

    Zhou and J

    B. Zhou and J. F. Beacom, Phys. Rev. D 109, 103003 (2024), arXiv:2311.05675 [hep-ph]

  77. [77]

    K. C. Y. Ng, J. F. Beacom, A. H. G. Peter, and C. Rott, Phys. Rev. D 96, 103006 (2017), arXiv:1703.10280 [astro-ph.HE]

  78. [78]

    Direct detection plots,

    C. O’Hare, “Direct detection plots,” https://github.com/cajohare/DirectDetectionPlots (2024)

  79. [79]

    Garani and S

    R. Garani and S. Palomares-Ruiz, JCAP 05, 042 (2022), arXiv:2104.12757 [hep-ph]

  80. [80]

    J. F. Acevedo, R. K. Leane, and J. Smirnov, JCAP 04, 038 (2024), arXiv:2303.01516 [hep-ph]

Showing first 80 references.