Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Long-lived heavy neutral leptons at the LHC: four-fermion single-$N_R$
  operators   Interest in searches for heavy neutral leptons (HNLs) at the LHC has
increased considerably in the past few years. In the minimal scenario, HNLs are
produced and decay via their mixing with active neutrinos in the Standard Model
(SM) spectrum. However, many SM extensions with HNLs have been discussed in the
literature, which sometimes change expectations for LHC sensitivities
drastically. In the $N_R$SMEFT, one extends the SM effective field theory with
operators including SM singlet fermions, which allows to study HNL
phenomenology in a "model independent" way. In this paper, we study the
sensitivity of ATLAS to HNLs in the $N_R$SMEFT for four-fermion operators with
a single HNL. These operators might dominate both production and decay of HNLs,
and we find that new physics scales in excess of 20 TeV could be probed at the
high-luminosity LHC.

20
The categories of this paper are: acc-phys
24
The categories of this paper are: dg-ga
12
The categories of this paper are: nucl-th
30
The categories of this paper are: q-alg
10
The categories of this paper are: q-bio
27
The categories of this paper are: comp-gas
4
The categories of this paper are: cond-mat
32
The categories of this paper are: atom-ph
26
The categories of this paper are: bayes-an
21
The categories of this paper are: adap-org
9
The categories of this paper are: nlin
17
The categories of this paper are: q-fin
28
The categories of this paper are: alg-geom
1
The categories of this paper are: cs
19
The categories of this paper are: eess
29
The categories of this paper are: funct-an