TY  - JOUR
AU  - Abada, A.
AU  - Escribano, P.
AU  - Marcano, X.
AU  - Piazza, G.
PY  - 2022
DA  - 2022//
TI  - Collider searches for heavy neutral leptons: beyond simplified scenarios
T2  - Eur. Phys. J. C
JO  - European Physical Journal C
SP  - 1030
EP  - 17pp
VL  - 82
IS  - 11
PB  - Springer
AB  - With very few exceptions, the large amount of available experimental bounds on heavy neutral leptons – HNL – have been derived relying on the assumption of the existence of a single (usually Majorana) sterile fermion state that mixes with only one lepton flavour. However, most of the extensions of the Standard Model involving sterile fermions predict the existence of several HNLs, with complex mixing patterns to all flavours. Consequently, most of the experimental bounds for HNLs need to be recast before being applied to a generic scenario. In this work, we focus on LHC searches of heavy neutral leptons and discuss how to reinterpret the available bounds when it comes to consider mixings to all active flavours, not only in the case with a single HNL, but also in the case when more heavy neutral leptons are involved. In the latter case, we also consider the possibility of interference effects and show how the bounds on the parameter space should be recast.
SN  - 1434-6044
UR  - https://arxiv.org/abs/2208.13882
UR  - https://doi.org/10.1140/epjc/s10052-022-11011-7
DO  - 10.1140/epjc/s10052-022-11011-7
LA  - English
N1  - WOS:000884904400006
ID  - Abada_etal2022
ER  -