Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: 7 keV sterile neutrino Dark Matter in extended seesaw framework   The appearance of a $3.5$ keV photon line in the X-ray spectra of Andromeda
galaxy and other galaxy clusters including the Perseus galaxy can be
interpreted as the signal of a $7$ keV sterile neutrino dark matter candidate
as one of the plausible explanations. We present here a novel framework of
extended seesaw mechanism where the lightest sterile neutrino acts as a Dark
Matter candidate and its decay into a photon and an ordinary neutrino accounts
for the excess 3.5 keV X-ray line. For implementing the idea, we add two
different types of neutral fermion singlets ($S_L$, $N_R$) to the SM light
neutrino $\nu_L$ so that the light neutrino mass is governed by generic linear
seesaw formula. We discuss the complementarity constraints on the model
parameters including sterile-active neutrino mixing angle within the extended
seesaw framework. Favorably, this framework can be embedded in a $SO(10)$ grand
unified theory.

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The categories of this paper are: plasm-ph
34
The categories of this paper are: chem-ph
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The categories of this paper are: math-ph
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The categories of this paper are: alg-geom
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The categories of this paper are: comp-gas
9
The categories of this paper are: nlin
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The categories of this paper are: bayes-an
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The categories of this paper are: acc-phys
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The categories of this paper are: hep-lat
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The categories of this paper are: patt-sol
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The categories of this paper are: hep-ex
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The categories of this paper are: nucl-ex
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The categories of this paper are: atom-ph
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The categories of this paper are: mtrl-th
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The categories of this paper are: cmp-lg
2
The categories of this paper are: math