Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Z-lineshape versus 4th generation masses   The dependence of the Z-resonance shape on the location of the threshold of
the N\bar{N} production (N is the 4th generation neutrino) is analyzed. The
bounds on the existence of 4th generation are derived from the comparison of
the theoretical expression for the Z-lineshape with the experimental data. The
4th generation is excluded at 95% C. L. for m_N<46.7\pm 0.2 GeV.

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The categories of this paper are: math-ph
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The categories of this paper are: q-fin
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The categories of this paper are: quant-ph
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The categories of this paper are: chao-dyn
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The categories of this paper are: hep-lat
20
The categories of this paper are: acc-phys
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The categories of this paper are: dg-ga
36
The categories of this paper are: cmp-lg
1
The categories of this paper are: cs
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The categories of this paper are: eess
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The categories of this paper are: alg-geom
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The categories of this paper are: hep-ex
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The categories of this paper are: atom-ph
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The categories of this paper are: plasm-ph
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The categories of this paper are: bayes-an
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The categories of this paper are: hep-th