Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Gauge and Gravity Amplitudes on the Celestial Sphere   The analytic structures of scattering amplitudes in gauge theory and gravity
are examined on the celestial sphere. The celestial amplitudes in the two
theories - computed by employing a regulated Mellin transform - can be compared
at low multiplicity. It is established by direct computation that up to five
external particles, the double copy relations of Kawai, Lewellen and Tye
continue to hold identically, modulo certain multiplicative factors which are
explicitly determined. Supersymmetric representations of the amplitudes are
utilized throughout, manifesting the double copy structure between
$\mathcal{N}=4$ super Yang-Mills and $\mathcal{N}=8$ supergravity on the
celestial sphere.

15
The categories of this paper are: nucl-ex
18
The categories of this paper are: econ
11
The categories of this paper are: hep-lat
30
The categories of this paper are: q-alg
20
The categories of this paper are: acc-phys
1
The categories of this paper are: cs
5
The categories of this paper are: gr-qc
26
The categories of this paper are: bayes-an
34
The categories of this paper are: chem-ph
37
The categories of this paper are: supr-con
13
The categories of this paper are: quant-ph
32
The categories of this paper are: atom-ph
24
The categories of this paper are: dg-ga
28
The categories of this paper are: alg-geom
17
The categories of this paper are: q-fin
31
The categories of this paper are: ao-sci