Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Determining the CP nature of spin-0 mediators in associated production
  of dark matter and $t \bar t$ pairs   In the framework of spin-0 $s$-channel simplified models, we explore the
possibility of assessing the structure of dark matter interactions through the
associate production of dark matter and $t\bar{t}$ pairs. To this purpose,
final states with two leptons are considered and the kinematic properties of
the dilepton system is studied. We develop a realistic analysis strategy and
provide a detailed evaluation of the achievable sensitivity for the dark matter
signal assuming integrated luminosities of $300 \, {\rm fb}^{-1}$ and $3 \,
{\rm ab}^{-1}$ at the 14 TeV LHC. Furthermore, upper limits on the mediator
masses for which the two different CP hypotheses can be distinguished are
derived. The obtained limits on the signal strengths are finally translated
into constraints on the parameter space of two spin-0 simplified models
including a scenario with an extended Higgs sector.

19
The categories of this paper are: eess
22
The categories of this paper are: chao-dyn
12
The categories of this paper are: nucl-th
30
The categories of this paper are: q-alg
17
The categories of this paper are: q-fin
2
The categories of this paper are: math
25
The categories of this paper are: patt-sol
28
The categories of this paper are: alg-geom
26
The categories of this paper are: bayes-an
7
The categories of this paper are: hep-th
31
The categories of this paper are: ao-sci
13
The categories of this paper are: quant-ph
27
The categories of this paper are: comp-gas
23
The categories of this paper are: solv-int
21
The categories of this paper are: adap-org
1
The categories of this paper are: cs