Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Chiral symmetry and spectrum of Euclidean Dirac operator   After recalling some connections between the Spontaneous Breakdown of Chiral
Symmetry (SBChS) and the spectrum of the Dirac operator for Euclidean QCD on a
torus, we use this tool to reconsider two related issues : the Zweig rule
violation in the scalar channel and the dependence of SBChS order parameters on
the number N_f of massless flavours. The latter would result into a great
variety of SBChS patterns in the (N_f,N_c) plane, which could be studied
through so-called Leutwyler-Smilga sum rules in association with lattice
computations of the Dirac spectrum.

37
The categories of this paper are: supr-con
26
The categories of this paper are: bayes-an
24
The categories of this paper are: dg-ga
30
The categories of this paper are: q-alg
29
The categories of this paper are: funct-an
8
The categories of this paper are: hep-ex
31
The categories of this paper are: ao-sci
15
The categories of this paper are: nucl-ex
2
The categories of this paper are: math
14
The categories of this paper are: math-ph
9
The categories of this paper are: nlin
6
The categories of this paper are: astro-ph
27
The categories of this paper are: comp-gas
5
The categories of this paper are: gr-qc
23
The categories of this paper are: solv-int
3
The categories of this paper are: physics