Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: TeV-scale Seesaw with Quintuplet Fermions   We propose a new seesaw model based on fermionic hypercharge zero weak
quintuplet in conjunction with additional scalar quadruplet which attains an
induced vev. The model provides both tree-level seesaw ~ v^6/M^5 and a
loop-suppressed radiative ~ (1 / 16 \pi^2) v^2/M contributions to active
neutrino masses. The empirical masses m_\nu ~ 10^{-1} eV can be achieved with M
~ TeV new states, accessible at the LHC. For 5 fb^{-1} of accumulated
integrated luminosity at the LHC, there could be ~ 500 doubly-charged
\Sigma^{++} or \bar{\Sigma^{++}} fermions with mass M_\Sigma = 400 GeV, leading
to interesting multi-lepton signatures. The neutral component of the fermion
quintuplet, previously identified as minimal dark matter candidate, becomes
unstable in the proposed seesaw setup. The stability can be restored by
introducing a Z_2 symmetry, in which case neutrinos get mass only from
radiative contributions.

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The categories of this paper are: nlin
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The categories of this paper are: hep-th
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The categories of this paper are: chem-ph
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The categories of this paper are: q-bio
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The categories of this paper are: astro-ph
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The categories of this paper are: hep-lat
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The categories of this paper are: hep-ex
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The categories of this paper are: chao-dyn
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The categories of this paper are: math
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The categories of this paper are: nucl-th
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The categories of this paper are: bayes-an
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The categories of this paper are: math-ph
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The categories of this paper are: gr-qc
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The categories of this paper are: solv-int
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The categories of this paper are: econ
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The categories of this paper are: alg-geom