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New Constraints on Millicharged Particles from Cosmic-ray Production
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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.
Forward citations
Cited by 4 Pith papers
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Direct Detection of Millicharged Particles from Supernovae
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Constraints and Projections for Millicharged Dark Matter in the Sun with Water Cherenkov Neutrino Detectors
Super-Kamiokande constrains millicharged dark matter at 5-28 GeV for fractional abundance 10^{-4.5}; Hyper-Kamiokande reaches down to 5x10^{-6}.
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Sub-GeV dark matter from cosmic ray bremsstrahlung in the atmosphere
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.
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Letter of Intent: The Forward Physics Facility
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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