Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A Very Heavy Sneutrino as Viable Thermal Dark Matter Candidate in
  $U(1)'$ Extensions of the MSSM   We study the Standard Model singlet ("right-handed") sneutrino $\tilde \nu_R$
dark matter in a class of $U(1)'$ extensions of the MSSM that originate from
the breaking of the $E_6$ gauge group. These models, which are referred to as
UMSSM, contain three right--handed neutrino superfields plus an extra gauge
boson $Z'$ and an additional SM singlet Higgs with mass $\simeq M_{Z'}$,
together with their superpartners. In the UMSSM the right sneutrino is charged
under the extra $U(1)'$ gauge symmetry; it can therefore annihilate via gauge
interactions. In particular, for $M_{\tilde \nu_R} \simeq M_{Z'}/2$ the
sneutrinos can annihilate by the exchange of (nearly) on--shell gauge or Higgs
bosons. We focus on this region of parameter space. For some charge assignment
we find viable thermal $\tilde \nu_R$ dark matter for mass up to $\sim 43$ TeV.
This is the highest mass of a good thermal dark matter candidate in standard
cosmology that has so far been found in an explicit model. Our result can also
be applied to other models of spin$-0$ dark matter candidates annihilating
through the resonant exchange of a scalar particle. These models cannot be
tested at the LHC, nor in present or near--future direct detection experiments,
but could lead to visible indirect detection signals in future Cherenkov
telescopes.

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The categories of this paper are: cmp-lg
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The categories of this paper are: funct-an
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The categories of this paper are: math-ph
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The categories of this paper are: q-fin
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The categories of this paper are: cs
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The categories of this paper are: alg-geom
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The categories of this paper are: ao-sci
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The categories of this paper are: acc-phys
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The categories of this paper are: nucl-ex
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The categories of this paper are: solv-int
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The categories of this paper are: adap-org
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The categories of this paper are: math
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The categories of this paper are: plasm-ph
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The categories of this paper are: q-alg
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The categories of this paper are: quant-ph
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The categories of this paper are: astro-ph