Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Doublet-singlet model and unitarity   We study the renormalizable singlet-doublet fermionic extension of the
Standard Model. In this model, the new vector-like fermions couple to the gauge
bosons and to the Higgs via new Yukawa couplings, that allow for nontrivial
mixing in the new sector, providing a stable, neutral dark matter candidate.
Approximate analytic formulae are given for the mass spectrum around the blind
spots, where the dark matter candidate coupling to $h$ or $Z$ vanishes. We
calculate the two particle scattering amplitudes in the model, impose the
perturbative unitarity constraints and establish bounds on the Yukawa
couplings.

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The categories of this paper are: math-ph
12
The categories of this paper are: nucl-th
35
The categories of this paper are: mtrl-th
20
The categories of this paper are: acc-phys
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The categories of this paper are: chao-dyn
27
The categories of this paper are: comp-gas
11
The categories of this paper are: hep-lat
1
The categories of this paper are: cs
37
The categories of this paper are: supr-con
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The categories of this paper are: patt-sol
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The categories of this paper are: dg-ga
13
The categories of this paper are: quant-ph
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The categories of this paper are: plasm-ph
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The categories of this paper are: nlin
4
The categories of this paper are: cond-mat
2
The categories of this paper are: math