The electric dipole moment challenge (EDM)
measures a non-zero proton EDM value and this book suggests how the challenge
can be met. Any measurably large proton EDM would violate the standard model.
The method to be employed uses an intense beam of "frozen spin"
protons circulating for hour-long times in a storage ring "trap.” The smallness of EDMs allows them to test
existing theories, but also makes them hard to measure. Such EDM experiments
are inexpensive, at least compared to building accelerators of ever-greater
energy.
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