What is Graviton-Graviton Scattering in Quantum Theory of Gravity?

[dpa]

Hi Everyone,
:shy:
I read in some paper about the significance of Graviton-Graviton Scattering as a theoretical tool in Quantum Theory of Gravity. Would someone bother to explain in detail what phenomena it is and how it is useful in Quantum Theory of Gravity.

And I might not have put the question accurately, you see.

Thank You.
DPA

 

[MathematicalPhysicist]

What paper is that?

 

[dpa]

Ah! The paper is just age old which I don't know, I just stumbled upon while searching about what graviton-graviton scattering is.
It might not have been important one, but here it is:

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Infrared behavior of graviton-graviton scattering
John F. Donoghue1 and Tibor Torma2
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arXiv:hep-th/9901156v1 dated: 28 Jan 1999
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I repeat, I might not have accurately paraphrased.