It is said that the Einstein-Hilbert term in the following couple mass and gravity.(adsbygoogle = window.adsbygoogle || []).push({});

Lagrangian = R/(16*pi*G_{N}) [Einstein-Hilbert term] + L (nongravitational)

How is the above derived? Is it enough to prove that there should be a theory of quantum gravity since mass and gravity are coupled together in that term?

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# Einstein-Hilbert term and mass, gravity

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