Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Effects Of The Quantity $\sigma_{TS}$ On The Spin Structure Functions Of
  Nucleons In The Resonance Region   In this paper, we investigate the effects of the quantity $\sigma_{TS}$ on
the spin-structure functions of nucleons in the resonance region. The Schwinger
sum rule for the spin structure function $g_2(x,Q^2)$ at the real photon limit
is derived for the nucleon treated as a composite system, and it provides a
crucial constraint on the longitudinal transition operator which has not been
treated consistently in the literature. The longitudinal amplitude $S_{\frac
12}$ is evaluated in the quark model with the transition operator that
generates the Schwinger sum rule. The numerical results of the quantity
$\sigma_{TS}$ are presented for both spin structure functions $g_1(x,Q^2)$ and
$g_2(x,Q^2)$ in the resonance region. Our results show that this quantity
  plays an important role in the low $Q^2$ region, which can be tested in the
future experiments at CEBAF.

14
The categories of this paper are: math-ph
16
The categories of this paper are: stat
34
The categories of this paper are: chem-ph
23
The categories of this paper are: solv-int
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The categories of this paper are: eess
10
The categories of this paper are: q-bio
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The categories of this paper are: hep-lat
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The categories of this paper are: dg-ga
30
The categories of this paper are: q-alg
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The categories of this paper are: quant-ph
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The categories of this paper are: q-fin
33
The categories of this paper are: plasm-ph
3
The categories of this paper are: physics
27
The categories of this paper are: comp-gas
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The categories of this paper are: chao-dyn
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The categories of this paper are: acc-phys