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A Weyl theory of dark matter

  1. Feb 18, 2005 #1


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    A "Weyl" theory of dark matter

    http://web.mit.edu/people/cabi/index.html by Hung Cheng of MIT, showing that if physics is locally conformal (independent of scale choice) then there is a vector particle he calls S which couples to a scalar particle like the hypothetical Higgs, or to a tensor particle like the hypothetical graviton, but not to any spinor particle such as electrons, quarks, neutrinos, etc, or to photons. So it is a candidate for dark matter. He says it might be detected at LHC through bremsstrahlung from the decay of a Higgs.
    Last edited by a moderator: Apr 21, 2017
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  3. Feb 18, 2005 #2


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    The proposed "S meson" is a spin 1 boson (this is what "vector" means in this context as I understand it), like the photon, W, Z and gluons.

    Saying that it interacts with the Higgs field is simply another way of saying that it has mass, unlike the photon, but like any other sub-atomic particle. Of course, anything with mass or energy (including the photon) would interact with the graviton.

    All other massive spin 1 bosons are "force carriers" which operate at short ranges in atomic nuclei. But, this would have no electro-magnetic charge, like the Z and gluons, but unlike the W, and unlike gluons, it would not be affected by the strong force either. (Would it mediate some, as yet undiscovered very weak, short range force?)

    Calling it an "S meson" as the paper does is confusing, as that term is usually reserved for bosons composed of a quark and an anti-quark, which seems contrary to the notion that these particles don't interact with the strong force. (Although a candidate to fill in the empty green-anti-green meson spot would be interesting).

    At least one difficulty of an "S meson" as a dark matter candidate, is explaining how it would take the characteristic distributions about galaxies that are observed, if it is so non-interactive. Why would it form halos instead of something else?
    Last edited: Feb 18, 2005
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