Improved upper limit on the photon rest mass

Details Improved upper limit on the photon rest mass Improved upper limit on the photon rest mass

Oct 1975

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975phrvl..35.1117b&link_type=abstract

Physical Review Letters, vol. 35, Oct. 27, 1975, p. 1117-1120.

Physics

19

Crab Nebula, Magnetohydrodynamic Waves, Particle Mass, Photons, Extremum Values, Plasma Diagnostics, Plasma Waves, Plasma-Particle Interactions, Tensor Analysis

Scientific paper

It is shown that application of standard MHD arguments to hydromagnetic waves observed in the Crab Nebula dramatically improves the upper bound on photon rest mass. The standard argument that massive photons are governed by the Phoca field equations is outlined and applied to wisp features (identified as hydromagnetic waves) observed in the Crab. The results imply an upper limit for the photon rest mass of between 3 by 10 to the -54th power and 3 by 10 to the -53rd power gram, which is smaller than the best previous limits by a factor of 10,000 to 100,000. It is noted that although the present limit is probably valid in order of magnitude, some doubt remains since there are inconsistencies in the standard arguments.

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