Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: An Analytical Method for the NLO QCD Corrections to Double-Higgs
  Production   We propose a new method to calculate analytically higher-order perturbative
corrections and we apply it to the calculation of the two-loop virtual
corrections to Higgs pair production through gluon fusion. The method is based
on the expansion of the amplitudes in terms of a small Higgs transverse
momentum. This approach gives a very good approximation (better than per-mille)
of the partonic cross section in the center of mass energy region
$\sqrt{\hat{s}} \lesssim 750$ GeV, where $\sim95\%$ of the total hadronic cross
section is concentrated. The presented method is general and can be applied in
a straightforward way to the computation of virtual higher-order corrections to
other $2\to2$ processes, representing an improvement with respect to
calculations based on heavy mass expansions.

29
The categories of this paper are: funct-an
14
The categories of this paper are: math-ph
6
The categories of this paper are: astro-ph
27
The categories of this paper are: comp-gas
10
The categories of this paper are: q-bio
36
The categories of this paper are: cmp-lg
26
The categories of this paper are: bayes-an
34
The categories of this paper are: chem-ph
18
The categories of this paper are: econ
2
The categories of this paper are: math
37
The categories of this paper are: supr-con
15
The categories of this paper are: nucl-ex
32
The categories of this paper are: atom-ph
35
The categories of this paper are: mtrl-th
7
The categories of this paper are: hep-th
19
The categories of this paper are: eess