Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: One-Electron Singular Branch Lines of the Hubbard Chain   The momentum and energy dependence of the weight distribution in the vicinity
of the one-electron spectral-function singular branch lines of the 1D Hubbard
model is studied for all values of the electronic density and on-site repulsion
$U$. To achieve this goal we use the recently introduced pseudofermion
dynamical theory. Our predictions agree quantitatively for the whole momentum
and energy bandwidth with the peak dispersions observed by angle-resolved
photoelectron spectroscopy in the quasi-1D organic conductor TTF-TCNQ.

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The categories of this paper are: alg-geom
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The categories of this paper are: mtrl-th
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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: comp-gas
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The categories of this paper are: acc-phys
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The categories of this paper are: hep-lat
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The categories of this paper are: econ
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The categories of this paper are: patt-sol
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The categories of this paper are: chem-ph
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The categories of this paper are: math-ph
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The categories of this paper are: dg-ga
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The categories of this paper are: astro-ph
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The categories of this paper are: stat
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The categories of this paper are: plasm-ph
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The categories of this paper are: adap-org