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Updated: Jul 11, 2026

Setting Limits on Supersymmetry Using Simplified Models
Published on: November 15, 2013
Quarks with unit charge: a search for anomalous hydrogen
Abstract:
Quarks of charge +1 and other anomalous hydrogen have been sought by using the 88-inch cyclotron at Berkeley as a high-energy mass spectrometer, with natural hydrogen and deuterium as the sources of ions. No quarks were observed, and limits were placed on their ratio to protons on the earth that vary from < 2 x 10(-19)for high masses (3 to 8.2 atomic mass units) to 10(-13) for the lowest masses (< (1/3) atomic mass unit).
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