I'm really stuck on the following idea. For gravity to in any way be 'unified' with the electroweak interaction wouldn't it need to include a model whereby the electron somehow tunnels to within the first electron shell of atoms from a mass approaching another mass and transmit a $W+$ or $W-$ particle (don't know which) between the electron and the nucleus? I'm thinking that if this isn't the case then it's best to just can the whole 'quantum gravity' stuff altogether and just stick with spacetime, which is like a 'fabric' and just say that there's no such thing as a 'graviton' at all. I'm sick of all this stuff.
closed as unclear what you're asking by AccidentalFourierTransform, StephenG, Jon Custer, Kyle Kanos, WillO Jul 18 '18 at 4:32
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I'm just guessing, but your logic seems to be that if gravity is unified with electroweak force, then a graviton has to be like a W boson and that's only a short-range force, so the two electrons would have to get close to exchange a graviton.
But a W boson is a short-range particle only because it is massive, and it is massive only because the Higgs field (1) has an electroweak charge (2) has a nonzero vev in its ground state.
By cotrast, the photon is the electroweak boson that doesn't interact with the Higgs field, and it is massless and long-range.
Also, quantum gravity does not conceptually require that gravity and electroweak forces are unified. Naively, gravitons are just a different class of particle. It's only in supergravity and string theory that they are unified with gauge bosons in various ways.