Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Determination of alpha_s(M_Z^2) from hadronic event shape observables in
  e+e- annihilation   The determination of alpha_s(M_Z^2) using O(alpha_s^2) calculations of
hadronic event observables in e+e- annihilation is reviewed. The large scatter
among alpha_s(M_Z^2) values determined from different observables may be
interpreted as arising from the effect of uncalculated higher-order
contributions. The application of `optimised' perturbation theory and Pade
approximants in an attempt to reduce this effect is discussed.

28
The categories of this paper are: alg-geom
2
The categories of this paper are: math
21
The categories of this paper are: adap-org
11
The categories of this paper are: hep-lat
7
The categories of this paper are: hep-th
6
The categories of this paper are: astro-ph
1
The categories of this paper are: cs
35
The categories of this paper are: mtrl-th
18
The categories of this paper are: econ
17
The categories of this paper are: q-fin
5
The categories of this paper are: gr-qc
34
The categories of this paper are: chem-ph
16
The categories of this paper are: stat
15
The categories of this paper are: nucl-ex
25
The categories of this paper are: patt-sol
29
The categories of this paper are: funct-an