Collider searches for heavy neutral leptons: beyond simplified scenarios
Entity
UAM. Departamento de Física TeóricaPublisher
SpringerDate
2022-11-15Citation
10.1140/epjc/s10052-022-11011-7
The European Physical Journal C 82.11 (2022): 1030
ISSN
1434-6044 (print); 1434-6052 (online)DOI
10.1140/epjc/s10052-022-11011-7Project
info:eu-repo/grantAgreement/EC/H2020/860881/EU//HIDDeN; Gobierno de España. CEX2020-001007-S; Gobierno de España. PID2019-108892RB-I00Editor's Version
https://doi.org/10.1140/epjc/s10052-022-11011-7Subjects
Neutrino Mass; Leptons; Dark Matter; FísicaRights
© The Author(s) 2022Abstract
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
Files in this item
Google Scholar:Abada, Asmaa
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Escribano, Pablo
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Marcano Imaz, Xabier
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Piazza, Gioacchino
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