Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Three-Loop Superfiniteness of N=8 Supergravity   We construct the three-loop four-point amplitude of N=8 supergravity using
the unitarity method. The amplitude is ultraviolet finite in four dimensions.
Novel cancellations, not predicted by traditional superspace power-counting
arguments, render its degree of divergence in D dimensions to be no worse than
that of N=4 super-Yang-Mills theory -- a finite theory in four dimensions.
Similar cancellations can be identified at all loop orders in certain unitarity
cuts, suggesting that N=8 supergravity may be a perturbatively finite theory of
quantum gravity.

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The categories of this paper are: adap-org
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The categories of this paper are: hep-lat
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The categories of this paper are: acc-phys
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The categories of this paper are: eess
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The categories of this paper are: nucl-th
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The categories of this paper are: econ
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The categories of this paper are: cond-mat
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The categories of this paper are: physics
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The categories of this paper are: nucl-ex
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The categories of this paper are: hep-ph
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The categories of this paper are: atom-ph
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The categories of this paper are: mtrl-th
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The categories of this paper are: ao-sci
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The categories of this paper are: supr-con
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The categories of this paper are: quant-ph
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The categories of this paper are: q-alg