Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: MeV neutrino dark matter: Relic density, lepton flavour violation and
  electron recoil   Right-handed neutrinos with MeV to GeV mass are very promising candidates for
dark matter (DM). Not only can they solve the missing satellite puzzle, the
cusp-core problem of inner DM density profiles, and the too-big-to fail
problem, {\it i.e.} that the unobserved satellites are too big to not have
visible stars, but they can also account for the Standard Model (SM) neutrino
masses at one loop. We perform a comprehensive study of the right-handed
neutrino parameter space and impose the correct observed relic density and SM
neutrino mass differences and mixings. We find that the DM masses are in
agreement with bounds from big-bang nucleosynthesis, but that these constraints
induce sizeable DM couplings to the charged SM leptons. We then point out that
previously overlooked limits from current and future lepton flavour violation
experiments such as MEG and SINDRUM heavily constrain the allowed parameter
space. Since the DM is leptophilic, we also investigate electron recoil as a
possible direct detection signal, in particular in the XENON1T experiment. We
find that despite the large coupling and low backgrounds, the energy thresholds
are still too high and the predicted cross sections too low due to the heavy
charged mediator, whose mass is constrained by LEP limits.

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The categories of this paper are: bayes-an
3
The categories of this paper are: physics
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The categories of this paper are: q-fin
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The categories of this paper are: comp-gas
10
The categories of this paper are: q-bio
14
The categories of this paper are: math-ph
5
The categories of this paper are: gr-qc
9
The categories of this paper are: nlin
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The categories of this paper are: chem-ph
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The categories of this paper are: mtrl-th
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The categories of this paper are: acc-phys
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The categories of this paper are: patt-sol
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The categories of this paper are: nucl-th
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The categories of this paper are: dg-ga
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The categories of this paper are: solv-int
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The categories of this paper are: econ