Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Calculational techniques (not only) for single top production   A next-to-leading order calculation for single top production including
spin-dependent observables requires efficient techniques for the calculation of
the relevant loop amplitudes. We discuss the adaption of dimensional
regularization, the spinor helicity method and of tensor integral reduction
algorithms to these needs.

19
The categories of this paper are: eess
9
The categories of this paper are: nlin
13
The categories of this paper are: quant-ph
37
The categories of this paper are: supr-con
1
The categories of this paper are: cs
20
The categories of this paper are: acc-phys
6
The categories of this paper are: astro-ph
22
The categories of this paper are: chao-dyn
2
The categories of this paper are: math
3
The categories of this paper are: physics
16
The categories of this paper are: stat
34
The categories of this paper are: chem-ph
12
The categories of this paper are: nucl-th
27
The categories of this paper are: comp-gas
15
The categories of this paper are: nucl-ex
4
The categories of this paper are: cond-mat