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The other three forces' mediating particles (photons etc.) are absorbed by their appropriate charge-carrying particles, but I can't seem to find a clear answer that applies to the gravitational force in a quantified scenario.

The different answers to this most basis question seem to elude me in frameworks of String theory and LQG, though it becomes more intuitive in the latter.

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    $\begingroup$ please, if you want people to devote time to create a good answer, invest time to create a good question. The title is promising but you will have to de-oversimplify it. -1 until that happens $\endgroup$
    – lurscher
    Commented Apr 5, 2011 at 18:34
  • $\begingroup$ Tried to make this a bit better - however the answer seems to be quite obvious. They interact with anything with mass or energy, I guess. $\endgroup$
    – Sklivvz
    Commented Apr 5, 2011 at 20:17
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    $\begingroup$ yes, I think this could be a duplicate question of this: physics.stackexchange.com/questions/427/… $\endgroup$
    – lurscher
    Commented Apr 5, 2011 at 20:20
  • $\begingroup$ Dear Sklivz thank for replying, though I wasn't aware that other people could edit ones questions. The things you edited out I liked, and thought were rather central, as of the question of the nature of the 'informing of space(time) by gravations'. The 'space' terms was important. I can't see that gravitions should have any business with matter at all, since matter just follows the spacetime trajectory of least resistance... so there is no need to communicate directly with matter. Therefore the rather provoking answer I provided: that gravitions inform everything but matter. $\endgroup$
    – Andersi2
    Commented Apr 5, 2011 at 20:34
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    $\begingroup$ @Sklivvz: 1) you started the discussion, so don't blame me. 2) How is discussion of what formalism of quantization we assume off topic in a question that has graviton in the title and is apparently confused by what a graviton is? $\endgroup$
    – Marek
    Commented Apr 6, 2011 at 14:29

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Well, the question as stated :

What do gravitons interact with?

is naive enough . It assumes gravitons exist in the way photons and gluons and Z exist.

In such a framework, the answer is : they interact with everything for which a Feynman diagram can be imagined.

The other three forces' mediating particles (photons etc.) are absorbed by their appropriate charge-carrying particles, is not quite correct.

The force mediating quanta interact with all matter, even if not at first order, through higher order loop Feynman diagrams , is the correct formulation.

but I can't seem to find a clear answer that applies to the gravitational force in a quantified scenario.

You mean a quantized scenario. In string theory, where the Feynman diagram formalism is appropriately modified for the extension to strings, a graviton will be a mediating particle on par with the other "forces" mediating interactions.

As was discussed in another question, the forces are an artificial carry over from the macroscopic classical world. What exist are interactions that are characterized by coupling constants which distinguish if the specific interaction is strong, gravitational, supersymmetric or...

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