Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Searching for the quark--diquark systematics of baryons composed by
  light quarks $q=u,d$   Supposing quark--diquark structure of baryons, we look for systematics of
baryons composed of light quarks ($q=u,d$). We systematize baryons using the
notion of two diquarks: (i) axial--vector state, $D^{1}_{1}$, with the spin
$S_D=1$ and isospin $I_D=1$ and (ii) scalar one, $D^{0}_{0}$, with the spin
$S_D=0$ and isospin $I_D=0$. We consider several schemes for the composed
baryons: (1) with different diquark masses, $M_{D^0_0} \ne M_{D^1_1}$, (2) with
$M_{D^0_0} = M_{D^1_1}$ and overlapping $qD^0_0$ and $qD^1_1$ states
(resonances), (3) with/without SU(6) constraints for low-lying states (with
quark--diquark orbital momenta L=0). In the high-mass region the model predicts
several baryon resonances at $M\sim 2.0-2.9$ GeV. Moreover, the model gives us
the double pole structure (i.e. two poles with the same Re$M$ but different
Im$M$) in many amplitudes at masses $M\ga 2.0$ GeV. We see also that for
description of low-lying baryons (with L=0), the SU(6) constraint is needed.

25
The categories of this paper are: patt-sol
26
The categories of this paper are: bayes-an
18
The categories of this paper are: econ
8
The categories of this paper are: hep-ex
35
The categories of this paper are: mtrl-th
4
The categories of this paper are: cond-mat
13
The categories of this paper are: quant-ph
29
The categories of this paper are: funct-an
23
The categories of this paper are: solv-int
33
The categories of this paper are: plasm-ph
28
The categories of this paper are: alg-geom
3
The categories of this paper are: physics
34
The categories of this paper are: chem-ph
21
The categories of this paper are: adap-org
2
The categories of this paper are: math
5
The categories of this paper are: gr-qc