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CPT and Lorentz Tests in Hydrogen and Antihydrogen

Robert Bluhm, Alan Kostelecky, Neil Russell

hep-pharXiv:hep-ph/9810269

Abstract

Signals for CPT and Lorentz violation at the Planck scale may arise in hydrogen and antihydrogen spectroscopy. We show that certain 1S-2S and hyperfine transitions can exhibit theoretically detectable effects unsuppressed by any power of the fine-structure constant.

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