Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Problems of determination of \sigma_{tot} at the LHC   The analysis of the procedure of the determining the parameters of the hadron
elastic scattering amplitude at high energy is presented. The exponential and
non-exponential form of the scattering amplitude are taken into account.
Especially, the impact of the real parts of the hadron scattering amplitude and
electromagnetic hadron interaction on the determination of the total cross
section is examined.

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The categories of this paper are: comp-gas
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The categories of this paper are: patt-sol
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The categories of this paper are: funct-an
23
The categories of this paper are: solv-int
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The categories of this paper are: supr-con
35
The categories of this paper are: mtrl-th
22
The categories of this paper are: chao-dyn
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The categories of this paper are: q-fin
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The categories of this paper are: nlin
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The categories of this paper are: stat
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The categories of this paper are: bayes-an
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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: alg-geom
6
The categories of this paper are: astro-ph
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The categories of this paper are: acc-phys