Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Non factorizable $O(\alpha\alpha_s)$ corrections to the process $Z\to
  b\bar{b}$   We evaluate non factorizable $O(\alpha\alpha_s)$ corrections to the process
$Z\to b\bar{b}$ due to the virtual t-quark. All two-loop vertex diagrams with
$W$'s and charged ghosts $\Phi$'s are included. They are evaluated in the large
top-mass expansion up to the $10^{th}$ order. Gluon Bremsstrahlung is taken
into account by integrating over the whole phase space. All calculations,
including Bremsstrahlung, are done in dimensional regularization. The expansion
coefficients of the large mass expansion are given in closed form. Their
expansion in $y=m_Z^2/4m_W^2$ is in agreement with the coefficients up to
$O(m_W^6/m_t^6)$ as given by Harlander et al.

12
The categories of this paper are: nucl-th
21
The categories of this paper are: adap-org
22
The categories of this paper are: chao-dyn
13
The categories of this paper are: quant-ph
5
The categories of this paper are: gr-qc
9
The categories of this paper are: nlin
31
The categories of this paper are: ao-sci
32
The categories of this paper are: atom-ph
4
The categories of this paper are: cond-mat
19
The categories of this paper are: eess
28
The categories of this paper are: alg-geom
29
The categories of this paper are: funct-an
26
The categories of this paper are: bayes-an
18
The categories of this paper are: econ
2
The categories of this paper are: math
8
The categories of this paper are: hep-ex