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Photon mass limit

  1. Nov 17, 2009 #1
    Can you tell me the best known upper bound for the photon mass? If possible also provide a link to the source or to a review article on the subject.

    Thanks much.:smile:
  2. jcsd
  3. Nov 17, 2009 #2
    The particle data group currently quotes :
    Photon Mass Bound Destroyed by Vortices E. Adelberger, G. Dvali, A. Gruzinov Phys.Rev.Lett.98:010402,2007
    [itex]m_\gamma < 10^{-26}[/itex] eV (assuming Higgs type mass)

    "Using plasma physics to weigh the photon" D D Ryutov 2007 Plasma Phys. Control. Fusion 49 B429-B438
    [itex]m_\gamma < 10^{-18}[/itex] eV (assuming Yukawa type modification of Maxwell only, or modified dispersion relation)
  4. Nov 17, 2009 #3
    In principle, there is no upper limit to the photon energy, although it has no rest mass. A photon of energy Ephoton can hit an extremely relativistic electron with an energy γm0c2 head on, and the photon energy gets boosted to [STRIKE]γ2 Ephoton[/STRIKE] ~4γ2 Ephoton by Compton scattering.

    One way to get an upper limit to the photon rest mass would be to very carefully do energy and momentum transfer in photon absorption:
    http://www.aip.org/pnu/2003/split/625-2.html [Broken]
    Bob S
    Last edited by a moderator: May 4, 2017
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