Tag: purcell
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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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The Purcell Club
At the request of Aiden, the whole team is now practicing how to carry out order of magnitude estimates. We meet every Tuesday from 16:00-17:00 and pick a Purcell problem at random from his series published in the 1980’s called The Back of the Envelope in the American Journal of…
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Purcell Cards (Order of Magnitude Physics)
Ed Purcell developed a set of constants/numbers that one could use to estimate physical quantities quickly. These notes could fit on a postcard and could be used for “back of the envelope” calculations. I obtained a copy of these notes from my Caltech PHY 103b Order of Magnitude class from…
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Preprint of EDM Review Paper posted to arXiv:1710.02504
This paper has been seven years in the making and counting. I have only participated in the last two and half years of this massive undertaking and found the process to be profoundly humbling. I am tremendously relieved to see this posted online and am looking forward to all of the feedback…
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