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arxiv: 2506.02251 · v2 · pith:LULAWHXEnew · submitted 2025-06-02 · ✦ hep-ex

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

S. Alcott , Z. Bhatti , J. Brooke , C. Campagnari , M. Carrigan , M. Citron , R. De Los Santos , A. De Roeck
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C. Dorofeev T. Du J. Goldstein F. Golf N. Gonzalez A. Haas J. Heymann C.S. Hill D. Imani M. Joyce K. Larina R. Loos S. Lowette H. Mei D.W. Miller B. Peng S.N. Santpu I. Reed E. Schaffer R. Schmitz J. Steenis D. Stuart J.S. Tafoya Vargas D. Vannerom T. Wybouw Z. Xiao H. Zaraket G. Zecchinelli C. Zheng
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classification ✦ hep-ex
keywords particleschargescollisionsproton-protonsearchanalysiscenter-of-masscern
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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 $\leq0.24~\rm{e}$ and masses $\geq0.45~\rm{GeV}$.

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