Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The Effects of the Massless O(alpha_s^2), O(\alpha\alpha_s), O(\alpha^2)
  QCD and QED Corrections and of the Massive Contributions to
  Gamma(H^0\rightarrow b\overline{b})   We consider in detail various theoretical uncertainties of the perturbative
predictions for the decay width of $H^0\rightarrow b\overline{b}$ process in
the region $50\ GeV< M_H\leq 2M_W$. We calculate the order
$O(\alpha_s^2)$-contributions to the expression for $\Gamma_{Hb\overline{b}}$
through the pole quark mass and demonstrate that they are important for the
elimination of the numerical difference between the corresponding expression
and the one through the running $b$-quark mass. The order $O(\alpha\alpha_s)$
and $O(\alpha^2)$ massless and order $O(m_b^2/M_H^2)$ massive corrections to
$\Gamma_{Hb\overline{b}}$ are also calculated. The importance of the latter
contributions for modeling of the threshold effects is demonstrated. The
troubles with identifying of the 4 recent L3 events $e^+e^-\rightarrow
l^+l^-\gamma\gamma$ with the decay of a Standard Higgs boson are discussed.

4
The categories of this paper are: cond-mat
33
The categories of this paper are: plasm-ph
34
The categories of this paper are: chem-ph
16
The categories of this paper are: stat
14
The categories of this paper are: math-ph
3
The categories of this paper are: physics
36
The categories of this paper are: cmp-lg
2
The categories of this paper are: math
8
The categories of this paper are: hep-ex
7
The categories of this paper are: hep-th
10
The categories of this paper are: q-bio
20
The categories of this paper are: acc-phys
21
The categories of this paper are: adap-org
37
The categories of this paper are: supr-con
25
The categories of this paper are: patt-sol
9
The categories of this paper are: nlin