Analysis reports the strongest constraints on millicharged particles in proton-proton collisions, highlighting finds from a 124.7 fb^{-1} dataset.
We report on a search for elementary particles with charges much smaller than the electron charge using a data sample of proton-proton collisions provided by the CERN Large Hadron Collider in 2023-24, corresponding to an integrated luminosity of 124.7 fb⁻¹ at a center-of-mass energy of 13.6 TeV. The analysis presented uses the completed Run 3 milliQan bar detector to set the most stringent constraints to date for particles with charges ≤0.24 e and masses ≥0.45 GeV.
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Alcott et al. (2025) studied this question.
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