Tag: time-reversal symmetry
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On the Possibility of Electric Dipole Moments for Elementary Particles and Nuclei
Published on this day 75 years ago is the paper by Edward M. Purcell and Norman F. Ramsey that launched search for the permanent electric dipole moment (EDM) neutrons, electrons, atomic nuclei, and other elementary particles such as muons. Ramsey recounts the story of how this paper and the first…
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Elementary Particles and Weak Interactions [BNL-443 (T-91)]
![Elementary Particles and Weak Interactions [BNL-443 (T-91)]](https://spinlab.me/wp-content/uploads/2017/03/bnl443.png)
This technical note by Lee & Yang, first published in October 1957, is based on a series of lectures given in January 1957. Of particular note is “Section III.4 Static Electric Dipole Moment” on page 17 which indicated, perhaps for the first time, that non-zero EDMs would violate not only…
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