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Strong-field cyclotron scattering. I - Scattering amplitudes and natural line widthThe introduction of resonance line width into the QED cyclotron scattering amplitudes is considered. It is shown that the width arises from loop corrections to the electron propagator, which also bring about shifts in the Landau energy levels. A formalism is developed that allows the dressed electron propagator to be derived. It is shown that the states of Herold et al. (1982) and of Sokolov and Ternov (1968), which diagonalize the component of the magnetic moment operator parallel to the external magnetic field, are appropriate for calculation of the scattering amplitudes, whereas the states of Johnson and Lippmann (1949) are not. In addition, it is shown that the Breit-Wigner broadening approximation E tends to E - i(Gamma)/2 is consistent with the perturbation-theoretic order of the calculation, if the former basis states are chosen, but not the latter.
Document ID
19930062333
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Graziani, Carlo
(Chicago Univ. IL, United States)
Date Acquired
August 16, 2013
Publication Date
July 20, 1993
Publication Information
Publication: Astrophysical Journal, Part 1
Volume: 412
Issue: 1
ISSN: 0004-637X
Subject Category
Astrophysics
Accession Number
93A46330
Funding Number(s)
CONTRACT_GRANT: NAGW-1284
CONTRACT_GRANT: NGT-50617
CONTRACT_GRANT: NAGW-830
CONTRACT_GRANT: NAG5-1454
Distribution Limits
Public
Copyright
Other

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