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New Constraints on Millicharged Particles from Cosmic-ray Production

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arxiv 2002.11732 v2 pith:VGCQT2KN submitted 2020-02-26 hep-ph astro-ph.COhep-ex

Ryan Plestid , Volodymyr Takhistov , Yu-Dai Tsai , Torsten Bringmann , Alexander Kusenko , Maxim Pospelov This is my paper
classification hep-phastro-ph.COhep-ex
keywords experimentsmcpsparticlesproductionconstraintsdetectorsfluxlarge-scale
verification ladder T0 review T1 audit T2 compute T3 formal
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abstract

We study the production of exotic millicharged particles (MCPs) from cosmic ray-atmosphere collisions which constitutes a permanent MCP production source for all terrestrial experiments Our calculation of the MCP flux can be used to reinterpret existing limits from experiments such as MACRO and Majorana on an ambient flux of ionizing particles. Large-scale underground neutrino detectors are particularly favorable targets for the resulting MCPs. Using available data from the Super-K experiment, we set new limits on MCPs, which are the best in sensitivity reach for the mass range $0.1 \lesssim m_{\chi} \lesssim 0.5$ GeV, and which are competitive with accelerator-based searches for masses up to 1.5 GeV. Applying these constraints to models where a sub-dominant component of dark matter (DM) is fractionally charged allows us to probe parts of the parameter space that are challenging for conventional direct-detection DM experiments, independently of any assumptions about the DM abundance. These results can be further improved with the next generation of large-scale neutrino detectors.

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Cited by 5 Pith papers

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

  1. Direct Detection of Millicharged Particles from Supernovae

    hep-ph 2026-06 unverdicted novelty 6.0 of 10

    Calculations show millicharged particles from supernovae can produce over 10 electron-recoil events per year in major detectors for millicharge 10^{-9} and sub-MeV to MeV masses, improving SN cooling bounds by up to a...

  2. Constraints on millicharged particles from nuclear gamma-decays

    hep-ph 2025-07 conditional novelty 6.0 of 10

    Nuclear gamma cascades in reactors produce millicharged particle pairs, giving the strongest constraints on millicharge for masses between 0.7 and 2 MeV.

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

    hep-ph 2026-06 unverdicted novelty 5.0 of 10

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

  4. Sub-GeV dark matter from cosmic ray bremsstrahlung in the atmosphere

    hep-ph 2026-04 unverdicted novelty 5.0 of 10

    Boosted sub-GeV dark matter from atmospheric cosmic ray bremsstrahlung can be probed by direct detection and neutrino experiments, with enhanced sensitivity near vector mediator resonances.

  5. Letter of Intent: The Forward Physics Facility

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    Proposes construction of the Forward Physics Facility at the HL-LHC with four complementary detectors to exploit forward neutrinos and new-particle fluxes for neutrino, QCD, astroparticle, and dark-matter measurements.

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