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Limits on the abundance of millicharged particles bound to matter

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arxiv 2012.08169 v3 pith:77MNTBHR submitted 2020-12-15 hep-ex astro-ph.COhep-phphysics.ins-detphysics.optics

Gadi Afek , Fernando Monteiro , Jiaxiang Wang , Benjamin Siegel , Sumita Ghosh , David C. Moore This is my paper · ORCID
classification hep-exastro-ph.COhep-phphysics.ins-detphysics.optics
keywords particlesmatterabundanceboundchargechargesmcpsmillicharged
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abstract

Millicharged particles (mCPs) are hypothesized particles possessing an electric charge that is a fraction of the charge of the electron. We report a search for mCPs with charges $\gtrsim 10^{-4}~e$ that improves sensitivity to their abundance in matter by roughly two orders of magnitude relative to previous searches. This search is sensitive to such particles over a wide range of masses and charges for which they can form stable bound states with matter, corresponding to a gap in parameter space that is beyond the reach of previous searches from accelerators, colliders, cosmic-ray experiments, and cosmological constraints.

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