Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Low energy constants from the chirally improved Dirac operator D_CI   The leading order low energy parameters like the pion decay constant or the
quark condensate are well-known from "classical" low energy theorems and
experiments. It is a challenge, however, to find these parameters based
exclusively on an ab-initio QCD calculation. We discuss results of a quenched
lattice calculation of low energy constants using the chirally improved Dirac
operator. Several lattice sizes at different lattice spacings are studied,
using pseudoscalar and axial vector correlators. We find consistent results for
f_\pi = 96(2) MeV, f_K = 105(2) MeV, \Sigma = -(286(4) MeV)^3, the average
light quark mass m = 4.1(2.4) MeV and m_s = 101(8) MeV.

22
The categories of this paper are: chao-dyn
29
The categories of this paper are: funct-an
19
The categories of this paper are: eess
35
The categories of this paper are: mtrl-th
23
The categories of this paper are: solv-int
1
The categories of this paper are: cs
16
The categories of this paper are: stat
8
The categories of this paper are: hep-ex
24
The categories of this paper are: dg-ga
25
The categories of this paper are: patt-sol
0
The categories of this paper are: hep-ph
2
The categories of this paper are: math
30
The categories of this paper are: q-alg
20
The categories of this paper are: acc-phys
6
The categories of this paper are: astro-ph
34
The categories of this paper are: chem-ph