Abstract
We use gamma-ray observations by the Fermi Large Area Telescope (Fermi-LAT) to impose limits on the properties of the hypothetical particle Weyl meson. Such mesons arise in theories which display local scale invariance and act as dark matter candidate. In a generalized locally scale invariant Standard Model it can decay or annihilate to the photon pair through the Higgs channel. We find that Fermi-LAT observations severely constrain the parameters of the Weyl meson.
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