Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Four Various String Baryon Models and Regge Trajectories   Rotational motions for the quark-diquark (q-qq), linear (q-q-q)
"three-string" (Y) and "triangle" string baryon models are considered and
applied to description of baryonic orbitally exited states on the Regge
trajectories. For the model "triangle" (three pointlike masses bounded pairwise
by relativistic strings) the rotating closed string has a form of a curvilinear
triangle composed of segments of a hypocycloid. The ultrarelativistic
asymptotic relation between the energy $E=M$ and the total angular momentum $J$
has the same form $J\simeq\alpha'E^2+\alpha_1E^{1/2}$ for rotational states in
all string baryon models. Taking into account some type of quark spin-orbit
interaction one can describe the baryonic Regge trajectories by means of all
mentioned string baryon configurations under assumption of different effective
string tensions for them. Model depending estimations of effective quark masses
in this procedure $m_{ud}\simeq 130$ MeV, $m_{s}\simeq 270$ MeV are close for
all string configurations.

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The categories of this paper are: acc-phys
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The categories of this paper are: solv-int
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The categories of this paper are: atom-ph
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The categories of this paper are: math-ph
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The categories of this paper are: q-alg
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The categories of this paper are: gr-qc
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The categories of this paper are: math
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The categories of this paper are: nucl-ex
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The categories of this paper are: nucl-th
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The categories of this paper are: nlin
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The categories of this paper are: q-bio
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The categories of this paper are: cmp-lg
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The categories of this paper are: comp-gas
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The categories of this paper are: cs
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The categories of this paper are: ao-sci
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The categories of this paper are: hep-th