Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Contact Interactions Involving Right-handed Neutrinos and SN1987A   We consider lepton-quark contact interactions in models with right-handed
neutrinos, and find that observational data from SN1987A restricts the scale of
such interactions to be at least $\Lambda>90$ TeV.

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The categories of this paper are: q-alg
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The categories of this paper are: atom-ph
16
The categories of this paper are: stat
36
The categories of this paper are: cmp-lg
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The categories of this paper are: eess
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The categories of this paper are: plasm-ph
17
The categories of this paper are: q-fin
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The categories of this paper are: econ
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The categories of this paper are: chao-dyn
8
The categories of this paper are: hep-ex
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The categories of this paper are: quant-ph
4
The categories of this paper are: cond-mat
10
The categories of this paper are: q-bio
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The categories of this paper are: mtrl-th
11
The categories of this paper are: hep-lat
6
The categories of this paper are: astro-ph