Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Right-handed sneutrino dark matter in $\mathbf{U(1)'}$ seesaw models and
  its signatures at the LHC   We suggest a real right-handed sneutrino, $\tilde N_1$, as a good dark matter
candidate in a supersymmetric $Z'$ model realizing the seesaw mechanism. When
the extra gaugino, $\tilde Z'$, is lighter than $Z'$, the thermal freeze-out of
the dark matter annihilation to right-handed neutrinos, $ \tilde{N}_1
\tilde{N}_1 \to NN$, through the $t$-channel $\tilde Z'$ exchange is shown to
produce the right dark matter density. It is essential to include the decay and
inverse decay of $N$ in this process, otherwise $N$ decouples too early and
thus dark matter is overproduced. At the LHC, the search for the seesaw
mechanism can be made by observing the signatures of $pp \to \tilde Z' \tilde
Z' \to NN + \ptmiss$ as $\tilde Z'$ can be copiously produced from the cascade
decays of gluinos/squarks, which is complementary to the search of $pp\to Z'
\to NN$. This may also open up a promising new channel of finding the Higgs
boson from the displaced $N$ decay.

32
The categories of this paper are: atom-ph
36
The categories of this paper are: cmp-lg
33
The categories of this paper are: plasm-ph
17
The categories of this paper are: q-fin
20
The categories of this paper are: acc-phys
9
The categories of this paper are: nlin
25
The categories of this paper are: patt-sol
2
The categories of this paper are: math
22
The categories of this paper are: chao-dyn
14
The categories of this paper are: math-ph
13
The categories of this paper are: quant-ph
10
The categories of this paper are: q-bio
21
The categories of this paper are: adap-org
29
The categories of this paper are: funct-an
12
The categories of this paper are: nucl-th
26
The categories of this paper are: bayes-an