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Proton Fixed-Target Scintillation Experiment to Search for Minicharged Particles

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arxiv 1812.03998 v2 pith:TPXVEUKW submitted 2018-12-10 hep-ph hep-ex

classification hep-phhep-ex
keywords detectorminichargedparticlesprotonsearchalternativeexperimentfermini
verification ladder T0 review T1 audit T2 compute T3 formal
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abstract

We propose a low-cost and movable setup to probe minicharged particles (or milli-charged particles) using high-intensity proton fixed-target facilities. This proposal, FerMINI, consists of a milliQan-type detector, requiring multi-coincident (nominally, triple-coincident) scintillation signatures within a small time window, located downstream of the proton target of a neutrino experiment. During the collisions of a large number of protons on the target, intense minicharged particle beams may be produced via meson photo-decays and Drell-Yan production. We take advantage of the high statistics, shielding, and potential neutrino-detector-related background reduction to search for minicharged particles in two potential sites: the MINOS near detector hall and the proposed DUNE near detector hall, both at Fermilab. We also explore several alternative designs, including the modifications of the nominal detector to increase signal yield, and combining this detector technology with existing and planned neutrino detectors to better search for minicharged particles. The CERN SPS beam and associated experimental structure also provide a similar alternative. FerMINI can achieve unprecedented sensitivity for minicharged particles in the MeV to few GeV regime with fractional charge $\varepsilon=Q_{\chi}/e $ between $10^{-4}$ (potentially saturating the detector limitation) and $10^{-1}$.

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Forward citations

Cited by 7 Pith papers

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

  1. A New Source of Millicharged Particles: Secondary Showers in the LHC Forward Absorber

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  3. 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...

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    A clockwork chain of U(1) gauge groups naturally generates a dark-matter electric charge of order 10^{-12}e with O(1) inputs, with the relic abundance set by resonant annihilation through TeV-scale Z' bosons.

  5. 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}.

  6. Letter of Intent: The Forward Physics Facility

    hep-ex 2025-10 unverdicted novelty 5.0 of 10

    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.

  7. The Dark Photon

    hep-ph 2020-05 unverdicted novelty 2.0 of 10

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