Equal-Time Commutators and Electromagnetic Mass Splittings
- Creators
- Boulware, David G.
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Deser, S.
Abstract
The relation between electromagnetic mass shifts (or splittings) to order α and equal-time commutators is analyzed. If the invariants in the forward spin-averaged Compton amplitude go as k^(−2) for k^2 → ∞, it is possible to relate the quadratic and logarithmic divergences in δm^2 to certain Lorentz scalars formed from the commutators. These results are illustrated by models with currents bilinear or linear in canonical fields. The Jost-Lehmann representation is then used to analyze more general behavior. It is shown that the spectral function may generate a higher-rank tensor character of the amplitude than that expected from its kinematic factors. The relation is then more complicated even if the commutators still exist. Finally, detailed criteria for the existence of equal-time commutators are developed.
Additional Information
© 1968 American Physical Society. (Received 17 June 1968) We wish to thank the 1967 Summer Institute of the Niels Bohr Institute for hospitality while this work was begun. One of us (D.G.B.) also thanks Brookhaven National Laboratory and Professor Abdus Salam and the International Atomic Energy Association for hospitality at the International Centre of Theoretical Physics, Trieste, while the work was completed. Work supported by U. S. Atomic Energy Commission under Grant No. RCO-1388B. Work supported by U. S. Air Force Office of Aerospace Research under Office of Scientific Research Grant No. AF 368-67.Attached Files
Published - PhysRev.175.1912.pdf
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Additional details
- Eprint ID
- 75212
- Resolver ID
- CaltechAUTHORS:20170317-143109687
- RCO-1388B
- Atomic Energy Commission
- AF 368-67
- Air Force Office of Scientific Research (AFOSR)
- Created
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2017-03-17Created from EPrint's datestamp field
- Updated
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2021-11-15Created from EPrint's last_modified field