A note on gauge theories coupled to gravity

  title={A note on gauge theories coupled to gravity},
  author={Thomas Banks and Matt Johnson and Assaf Shomer},
  journal={Journal of High Energy Physics},
We analyze the bound on gauge couplings e ≥ m/mp, suggested by Arkani-Hamed et.al. We show this bound can be derived from simple semi-classical considerations and holds in spacetime dimensions greater than or equal to four. Non abelian gauge symmetries seem to satisfy the bound in a trivial manner. We comment on the case of discrete symmetries and close by performing some checks for the bound in higher dimensions in the context of string theory. 

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