A presenter recently said this at a colloquium, but they didnt explain why. I know a fair bit of GR and Yang-Mills theory, so dont shy away from the details (unless they are cumbersome and don't aid in understanding).

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    $\begingroup$ Answered here. physics.stackexchange.com/a/78999/66086 $\endgroup$ – Cosmas Zachos Feb 1 at 3:56
  • $\begingroup$ @CosmasZachos Not a good answer. Just a verbal description of a mathematical formula with no physical meaning given. May do for the OP, but meaningless for 99% users here. $\endgroup$ – safesphere Feb 1 at 8:10
  • $\begingroup$ A proof that a scalar-mediated force between like charges has the opposite sign from a gauge-vector-mediated force between like charges is outlined here: physics.stackexchange.com/a/436556. That doesn't address the question about spin-2, though. $\endgroup$ – Dan Yand Feb 1 at 13:48
  • $\begingroup$ The answer physics.stackexchange.com/a/78999 gives a few hints about how to derive it. But if you follow the "duplicate" link and then follow a link in anna v's answer there, it leads you to this site: quora.com/Quantum-Field-Theory/…, which gives a more explicit outline. $\endgroup$ – Dan Yand Feb 1 at 14:03

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