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SENSEI: Search for Millicharged Particles produced in the NuMI Beam

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arxiv 2305.04964 v2 pith:V4JJED5E submitted 2023-05-08 hep-ex physics.ins-det

classification hep-exphysics.ins-det
keywords particlesmillichargedbeamproducedsenseidataexperimentfixed
verification ladder T0 review T1 audit T2 compute T3 formal
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Millicharged particles appear in several extensions of the Standard Model, but have not yet been detected. These hypothetical particles could be produced by an intense proton beam striking a fixed target. We use data collected in 2020 by the SENSEI experiment in the MINOS cavern at the Fermi National Accelerator Laboratory to search for ultra-relativistic millicharged particles produced in collisions of protons in the NuMI beam with a fixed graphite target. The absence of any ionization events with 3 to 6 electrons in the SENSEI data allow us to place world-leading constraints on millicharged particles for masses between 30 MeV to 380 MeV. This work also demonstrates the potential of utilizing low-threshold detectors to investigate new particles in beam-dump experiments, and motivates a future experiment designed specifically for this purpose.

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Cited by 3 Pith papers

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

  1. 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.

  2. Search for millicharged particles in proton-proton collisions at $\sqrt{s} = 13.6$ TeV

    hep-ex 2025-06 accept novelty 6.0 of 10

    No millicharged particles were found in 124.7 fb^-1 of 13.6 TeV data; milliQan sets the strongest limits to date for masses >= 0.45 GeV and charges <= 0.24 e.

  3. DarkNESS: A skipper-CCD NanoSatellite for Dark Matter Searches

    astro-ph.IM 2025-05 conditional novelty 6.0 of 10

    A mission design paper describing how a skipper-CCD CubeSat in low Earth orbit could search for strongly interacting sub-GeV dark matter and decaying dark matter X-rays.

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