Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Two-loop current-current operator contribution to the non-leptonic QCD
  penguin amplitude   The computation of direct CP asymmetries in charmless B decays at
next-to-next-to-leading order (NNLO) in QCD is of interest to ascertain the
short-distance contribution. Here we compute the two-loop penguin contractions
of the current-current operators Q_{1,2} and provide a first estimate of NNLO
CP asymmetries in penguin-dominated b -> s transitions.

25
The categories of this paper are: patt-sol
9
The categories of this paper are: nlin
17
The categories of this paper are: q-fin
27
The categories of this paper are: comp-gas
37
The categories of this paper are: supr-con
31
The categories of this paper are: ao-sci
34
The categories of this paper are: chem-ph
11
The categories of this paper are: hep-lat
30
The categories of this paper are: q-alg
2
The categories of this paper are: math
36
The categories of this paper are: cmp-lg
1
The categories of this paper are: cs
18
The categories of this paper are: econ
21
The categories of this paper are: adap-org
28
The categories of this paper are: alg-geom
15
The categories of this paper are: nucl-ex