TY  - JOUR
AU  - Beltran, R.
AU  - Cottin, G.
AU  - Helo, J. C.
AU  - Hirsch, M.
AU  - Titov, A.
AU  - Wang, Z. S.
PY  - 2022
DA  - 2022//
TI  - Long-lived heavy neutral leptons at the LHC: four-fermion single-N-R operators
T2  - J. High Energy Phys.
JO  - Journal of High Energy Physics
SP  - 044
EP  - 18pp
VL  - 01
IS  - 1
PB  - Springer
KW  - Beyond Standard Model
KW  - Effective Field Theories
KW  - Neutrino Physics
AB  - 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.
SN  - 1029-8479
UR  - https://arxiv.org/abs/2110.15096
UR  - https://doi.org/10.1007/JHEP01(2022)044
DO  - 10.1007/JHEP01(2022)044
LA  - English
N1  - WOS:000742012500001
ID  - Beltran_etal2022
ER  -