Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Extending two-Higgs-doublet models by a singlet scalar field - the Case
  for Dark Matter   We extend the two-Higgs doublet models of Type I and Type II by adding a real
gauge-singlet scalar S dark matter candidate (2HDMS models). We impose
theoretical constraints deriving from perturbativity, stability, unitarity and
correct electroweak symmetry breaking and require that the lightest CP-even
Higgs, h, fit the LHC data for the $\sim 125.5$ GeV state at the $68\%$~C.L.
after including existing constraints from LEP and B physics and LHC limits on
the heavier Higgs bosons. We find that these models are easily consistent with
the LUX and SuperCDMS limits on dark-matter-Nucleon scattering and the observed
$\Omega h^2$ for S masses above about 55 GeV. At lower $m_S$, the situation is
more delicate. For points with $m_S$ in the 6-25 GeV range corresponding to the
CDMS~II and CRESST-II positive signal ranges, the dark-matter-Nucleon cross
sections predicted by the Type I and Type II models more or less automatically
fall within the $95\%-99\%$~C.L. signal region boundaries. Were it not for the
LUX and SuperCDMS limits, which exclude all (almost all) such points in the
case of Type I (Type II), this would be a success for the 2HDMS models. In
fact, in the case of Type II there are a few points with 5.5 GeV $\leq m_S
\leq$ 6.2 GeV that survive the LUX and SuperCDMS limits and fall within the
CDMS~II 99\% C.L. signal region. Possibilities for dark matter to be
isospin-violating in this 2HDMS context are also examined.

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The categories of this paper are: math
37
The categories of this paper are: supr-con
14
The categories of this paper are: math-ph
17
The categories of this paper are: q-fin
6
The categories of this paper are: astro-ph
10
The categories of this paper are: q-bio
27
The categories of this paper are: comp-gas
26
The categories of this paper are: bayes-an
28
The categories of this paper are: alg-geom
9
The categories of this paper are: nlin
12
The categories of this paper are: nucl-th
20
The categories of this paper are: acc-phys
34
The categories of this paper are: chem-ph
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The categories of this paper are: eess
11
The categories of this paper are: hep-lat
3
The categories of this paper are: physics